Andy Hall
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testtubegames.com
Andy Hall
@testtubegames.com
1.2K followers 750 following 840 posts
Game Developer behind TestTubeGames.
Enjoy building, finding, and sharing cool science through games / toys / simulations.

My games: https://testtubegames.com
Other games I love: https://thescienceplayground.com/

he/him
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testtubegames.com
Andy Hall @testtubegames.com · Nov 13
You probably see me share a lot of science projects, but I also work on my own.

The current game: Agent Higgs 2!

It's a puzzle game where the pieces are the particles of the Standard Model.

Yes, *all* the particles. Yes, it was a questionable scope. Yes, it's still under development. (1/?)
Title screen of a cartoony style game. Title Agent Higgs 2, subtitle: Escape from the Standard Model. There are three buttons shaped like folders that say Play, Editor, and About. There is a red H with groucho Marx glasses in the middle of the screen, partially hiding behind a wooden crate. Around them are a variety of crates as well as particle tiles. There is a blue box with a p and a plus sign on it, representing a proton. Similarly there is an electron, muon, tau, and neutron block. Level in a grid based puzzle game. There are a variety of tiles, with Higgs trapped behind many wooden boxes in the corner. There are four electrons grouped together, and four positron tiles in a vertical line nearby. A small mysterious figure says "Don't think of it as particles dying. Think of it as particles changing. Changing into... being dead. You know what, let's move on." Tile based level of a game. Again, Higgs is in the lower corner, this time blocked by many black tiles representing holes in the level. There are four protons and four neutrons grouped in the upper left of the level. This time the mysterious figure says "A little danger is nothing you can't handle... right?"
Reposted by Andy Hall
drskyskull.bsky.social
It turns out that you can create an interference pattern using light from two independent lasers. The interference arises from the quantum view that you cannot tell which laser any individual photon came from.
petrockette.bsky.social petrockette @petrockette.bsky.social · 20h
I want you to tell me something about photons that I do not know. This is sincere and friendly and not hostile
January 9, 2026 at 11:04 PM
Reposted by Andy Hall
waynestatechem.bsky.social
The Mentos challenge just got serious 🧐 See what happens when chem prof Tom Kuntzleman dds Mentos to a bottle of champagne in comparison to a different carbonated beverage. Cheers! #wsuchemistry #ChemSky #mentoschallenge #ChemEd
January 6, 2026 at 8:34 PM
Reposted by Andy Hall
queenofpeat.bsky.social
Let’s make 2026 the year of the bog. The world’s most unique and interesting plants, clean water, cooler climate. Bogs deserve our thanks, care, and deep respect. Please join me and love a bog today.
Image of an Alaskan bog with water and red moss in the foreground and trees in the background.
January 5, 2026 at 10:15 PM
testtubegames.com
Intrigued by this new collection of learning games. You all know I love a good list...
"Vault Game Library"
vaultlearninggames.org
Vault Learning Games Library
Vault is the most comprehensive library of free learning games for grade 3+ created by education researchers at Field Day Lab (University of Wisconsin - Madison)
vaultlearninggames.org
December 19, 2025 at 5:45 PM
Reposted by Andy Hall
testtubegames.com
When you look around a creatives discord server and realize folks have only been sharing AI-related creations for months...

Hope somebody who needs this message finds it.
Discord server message, small cartoon character icon, message written by andy. "That's that, then. If there are any folks that are against using AI and in the creator space, feel free to track me down elsewhere. You're not alone, and I'd love to support your stuff."
December 17, 2025 at 3:23 PM
testtubegames.com
When you look around a creatives discord server and realize folks have only been sharing AI-related creations for months...

Hope somebody who needs this message finds it.
Discord server message, small cartoon character icon, message written by andy. "That's that, then. If there are any folks that are against using AI and in the creator space, feel free to track me down elsewhere. You're not alone, and I'd love to support your stuff."
December 17, 2025 at 3:23 PM
Reposted by Andy Hall
kslivensky.bsky.social
Writers and illustrators tend to be against AI, but where I haaave seen it crop up or be admitted to in the Kidlit arena is in creating additional resources, like activities and discussion guides.

Please be assured, *nothing* I create is done with AI. Including bonus resources like these.
❤️⬇️
#NoAI
kslivensky.bsky.social Katie Slivensky @kslivensky.bsky.social · Dec 3
Hey, #Edusky, I not only write #STEM books for kids, I have classroom and home #STEM activities on my website that tie into the books! And are free to download! And are created and vetted by a professional science educator (me!)! 😀

#KidLit

Find them here: www.katieslivensky.com/resources
Model fossil impression of a paw print and human hand side by side made with fossil dough. A set of items needed to do a geology activity, including aluminum foil, crayons, a cutting board, bowls, a knife, a spoon, and a toothpick. A set of items needed to do a volcano activity, including ketchup, a measuring cup, baking soda, an empty bottle, spoons, dishsoap, clay, and vinegar. A tiny robot made with wires, a battery, a vibrating motor, pipe cleaners, and a googly eye.
December 11, 2025 at 6:19 PM
Reposted by Andy Hall
kslivensky.bsky.social
Hey there, I, ROCK: A Geology Tale fans. 😁🪨

Guess who's teaming up again??? This time, we aren't Earthbound... Steph Stilwell and I are back at it, taking on ASTRONOMY!!! 😃⭐🌌🔭

I am so beyond excited to announce this new #BookDeal!!!!

Ahhhh!!!! 😃😃🤩

#KidLit
#STEMLit
#PictureBooks
Publishers Marketplace Deal Report, December 9, 2025. I'M A STAR By Katie Slivensky, Steph Stilwell Imprint: Beach Lane Books Katie Slivensky's I'M A STAR, an astronomy tale with humor, heart, and plenty of stellar facts, told from the viewpoint of one of our galaxy's newest and most enthusiastic stars, illustrated by Steph Stilwell, to Andrea Welch at Beach Lane Books, in an exclusive submission, for publication in spring 2028, by Ammi-Joan Paquette at Aevitas Creative Management for the author, and by Aliza Hoover at The CAT Agency for the illustrator (world). Framed by an adorable graphic of outer space characters, various planets and one big smiling star, illustrated by Steph Stilwell.
December 11, 2025 at 2:24 PM
Reposted by Andy Hall
kslivensky.bsky.social
👀👀👀👀👀👀

I SPY A FAMILIAR ROCK!!!!!!

😃😃😃🥳

Holy moly, THANK YOU, @slj.com!!!
Yellow graphic of Rock from I, ROCK celebrating with mineral friends. Text says SLJ Best Book of 2025. Art by Steph Stilwell. Book written by Katie Slivensky and illustrated by Steph Stilwell.
November 19, 2025 at 7:51 PM
Reposted by Andy Hall
easmussen.bsky.social
New trailer for Factory Town 2 just dropped!! www.youtube.com/watch?v=IEcR...
Factory Town 2: Paradise [Official Trailer]
YouTube video by 82apps
www.youtube.com
November 13, 2025 at 3:22 PM
Reposted by Andy Hall
kslivensky.bsky.social
4yo, getting a reasonable 2/4 right while singing How It's Done from Kpop Demon Hunters:

~~"Meals. Nails. Blade. Mosquitoes."~~
October 14, 2025 at 10:41 PM
testtubegames.com
A box of gas (blue) + dark matter (green), now with a smoother distribution at the start.

(gravity + pressure + viscosity, 16k particles, periodic 2d)
October 7, 2025 at 3:48 PM
Reposted by Andy Hall
testtubegames.com
I love this simulation of the early universe, part of our new CMB project.

This is early on - (~300,000 years after the Big Bang). The universe is so hot, plasma is everywhere. Photons can't travel far, bouncing off electric charges.
October 3, 2025 at 2:59 PM
Reposted by Andy Hall
testtubegames.com
Some more 'gas' particles - this time two clumps in orbit. Pretty dangerous tides, if you ask me.

(16k particles, gravity + pressure + viscosity)
October 3, 2025 at 2:39 PM
testtubegames.com
I love this simulation of the early universe, part of our new CMB project.

This is early on - (~300,000 years after the Big Bang). The universe is so hot, plasma is everywhere. Photons can't travel far, bouncing off electric charges.
October 3, 2025 at 2:59 PM
testtubegames.com
Some more 'gas' particles - this time two clumps in orbit. Pretty dangerous tides, if you ask me.

(16k particles, gravity + pressure + viscosity)
October 3, 2025 at 2:39 PM
Reposted by Andy Hall
testtubegames.com
Oops, the gas simulation made a Saturn, I guess?

(8k particles, all feeling gravity + pressure + viscosity)
October 2, 2025 at 1:29 AM
testtubegames.com
Oops, the gas simulation made a Saturn, I guess?

(8k particles, all feeling gravity + pressure + viscosity)
October 2, 2025 at 1:29 AM
Reposted by Andy Hall
testtubegames.com
Related physics puzzle - can you figure out this SPOOKY force law?

Bonus point: If this force law were to dress up for Halloween, what costume would it wear?
October 1, 2025 at 5:15 PM
Reposted by Andy Hall
luckytran.com
"If we lose hope, we're doomed."

We must continue Dr. Jane Goodall's mission and all fight for the future of the planet.
October 1, 2025 at 7:31 PM
testtubegames.com
Related physics puzzle - can you figure out this SPOOKY force law?

Bonus point: If this force law were to dress up for Halloween, what costume would it wear?
October 1, 2025 at 5:15 PM
testtubegames.com
Tis a season.

Why does the ghost behave the way the ghost does? An eternal, and in this case, very specific, question.

(Single central pumpkin-y mass, gravity with a 1/r^2 force law.)
October 1, 2025 at 3:31 PM
Reposted by Andy Hall
phetsims.bsky.social
Explore the mysteries of quantum mechanics with our Quantum Measurement sim! Prepare & measure superposition states, dive into photon polarization, and experiment with Stern-Gerlach setups. phet.colorado.edu/en/simulatio... #physics #chatphysics #STEM
September 27, 2025 at 1:10 AM
Reposted by Andy Hall
testtubegames.com
Ooh, this time a spherical cloud of gas, initially spinning slowly.

No periodic boundary conditions now, just let it collapse.

...whoa.

(Gravity + Pressure + Viscosity, 16k particles.)
September 24, 2025 at 3:00 PM