Our Games

Our games get world-class research out to the public.

Legend of the Lost Emerald
Lost at the Forever Mine
Jo Wilder and the Capitol Case
The Yard Games
Atom touch

Mixed Reality

Our games get world-class research out to the public.

The Station:Maine
Ice Cube

Crystal Cave

Travel underground to a crystal cave and learn how crystals form! Made with our partners at UW-MRSEC and Wisconsin DPI.

At a Glance

  • Grades: 5-8
  • Playtime: 10-20 minutes
  • Play from a web browser—no logins or downloads required
  • Free to play

About the Game

This simple puzzle game introduces kids to crystals! Players join the kids of the Yard and try their hand at arranging molecules with different shapes and properties into an ordered, stable configuration. Learn about crystals, repeating patterns, and molecular charges.

Topics Addressed

  • Crystals
  • Geometric Arrangements
  • Molecular Charges
  • Molecular Stability

Next Gen Science Standards (NGSS)

  • MS-PS1-1
  • MS-PS1-2

Game Types

  • single player

About the Yard Games

The Crystal Cave is part of the Yard Games, our collection of middle school science games. Designed as playful introductions to complex topics, the games are online and free to play.


We created Crystal Cave with our amazing partners at UW-MRSEC and Wisconsin DPI. Our team relied on the expertise of teacher fellows from across Wisconsin to help conceive, design, and test the games.