Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
Element Quiz
Match element symbols, put them in order of atomic number, and open as few clues as possible to score high while learning 30 elements.
Balance Logic Puzzle
Read only how the scales tip to spot the heaviest, put all of them in order, and work out the unknown weight.
Perfect Pitch Test
Spot the odd note out, order sounds from low to high, and slide to match the target pitch exactly in a daily ear test everyone hears alike.
Color Perception Test
Spot the odd tile, order colors from darkest to lightest, and match a target with two sliders to sharpen your eye for tiny brightness differences.
Guess the Drawing
Draw the word with pictures only — no letters or numbers — so your team can guess it before the timer runs out, and see which team scores highest.
Act It Out
Act out the word on each card with gestures alone while your teammates guess, scoring points before the timer runs out.
Liar Game
Pass one phone around to check the secret word, then use turn-by-turn clues and a vote to unmask the liar who never saw it.
Moon Phase Simulator
Move the Moon around Earth to see how the Sun–Earth–Moon positions create the eight lunar phases.
Cell Organelles
Switch between animal and plant cells and tap each organelle to see how the nucleus, mitochondria, and chloroplasts do their jobs.
Volcanoes & Earthquakes
Push plates together, slide them past each other, or pull them apart to see how mountains, volcanoes, and earthquakes form.
Coordinates and Collision
Add to or subtract from x and y, where y grows downward, to move an object and use inequalities to tell whether two boxes collide.
Lights Out
Tap a tile to flip its light and the four around it in a cross, and switch every lamp off in the fewest moves.
Daily Number Baseball
Use strike and ball hints to eliminate possibilities and uncover the hidden three-digit number.
One-Line Drawing
Tap the dots to trace every line exactly once and find out why only one dot works as the starting point.
Schulte Table
Tap the numbers 1 through 25 in order to clock your time, then race a friend's ghost on the same daily board.
Arithmetic Puzzle
Combine two tiles with +−×÷ to hit today's target number in the fewest steps.
Heat Transfer
Heat copper, iron, glass, and wood rods and move the heat source to see how conduction differs from convection.
Dissolution & Solutions
Spoon in salt, sugar, alum, or flour and change the temperature to compare how much dissolves in water.
Separating Mixtures
Choose a sieve, magnet, filter, or evaporation and watch the particles split into two bowls, discovering which property makes the separation work.
Insect Life Cycles
Tap insects to see which ones have a pupa, and discover how complete metamorphosis differs from incomplete metamorphosis.
Rock Layers and Fossils
Stack gravel, sand, and mud into layers and clear the dirt to uncover fossils, discovering that the deeper a layer sits, the older it is.
Levers and Pulleys
Move the fulcrum and switch pulley types to see how much less force is needed to lift a load.
Acids and Bases
Drop cabbage indicator into solutions and slide the pH to see how acids, neutrals, and bases each change color.
Kohlrabi Craft
Minecraft-style 3D voxel sandbox — explore endless terrain, mine blocks, craft, and survive. Features survival and creative modes, crafting, smelting, chests, mobs, day-night cycle, 7 languages, and mobile support.
The Solar System
Tap each of the eight planets to compare its order from the Sun, size against Earth, and year length.
Sound & Vibration
Change frequency and amplitude to watch the waveform shift and hear how pitch and loudness change.
Human Body Organs
Tap the brain, heart, lungs, stomach, and kidneys on the body to find out what each organ does.
Buoyancy and Density
Change mass and size to adjust density and find out why objects float or sink.
Electric Circuits
Wire batteries, bulbs, and switches, then drop in conductors or insulators to find out what makes the light turn on.
Magnets and Compasses
Move a magnet around the compass and flip its poles to see when the needle is attracted and when it is repelled.
States of Water
Raise and lower the temperature to see how water turns into ice, liquid, or vapor and how its molecules move.
The Water Cycle
Click evaporation, condensation, precipitation, and collection to follow a droplet's journey between sky and ground.
Light and Shadows
Move the sun across the sky and watch how a tree's shadow changes in direction and length.
How Plants Grow
Adjust water and sunlight to see how a seed grows into a sprout, leaves, and a flower, and what goes wrong when either is off.
Changing Seasons
Orbit Earth around the Sun to find out how its tilted axis brings summer, winter and the changing scenery.
Today's Times Tables
Answer multiplication facts in 60 seconds, build streaks for stars, and fill in the 2–9 times tables to speed up your mental math.
Pass the Bomb!
A real-time multiplayer game where you lose if the bomb explodes in your hands! Invite friends with a room code, or add bots to play. 2-8 players, with changing fuse times each round!
Reaction Time Test
Wait for the green flash, then tap: your reaction time is measured in milliseconds while you duel a friend or a bot in a best-of-five.
Stroop Test
Tap the ink colour rather than the word it spells for sixty seconds and feel the Stroop effect fight your hand.
Gambit — Multiplayer Chess
♟️ Chess in the browser, in real time. Add a bot (easy, normal or hard) and start at once, or share the invite link and take a seat opposite a friend — the move list, check and promotion are all handled for you.
Pass the Bomb!
💣 A real-time party game for a room full of friends: pass the bomb on before it goes off, and hope it is not in your hands at zero. Share the invite link and everyone plays from their own phone.
Ladder Bomb — Multiplayer Party Game
A mobile-first real-time multiplayer Ladder Game web app for up to 16 players.
Neon Arena Snake
🐍 Eat fast, chain the rush and dodge the hard-light barricades. The combo reactor drains every second — hesitate and your multiplier collapses. Arrow keys, WASD or touch; the speed climbs as you grow.
Collabby Valley — Music & Quests
Cozy Collabby farm game with 3 quests, coins, and a happy chicken.