Learn about reversible & irreversible changes by testing what happens to different substances as you experiment with them in this fun, interactive activity for kids. Find out what substances dissolve in water and lots of other interesting chemistry related facts. Can all substances be turned back to their original form after they mix with water or will they stay that way forever? Try dissolving flour, sugar and sand in a beaker of water, what happens? Is it what you expected? Is melting ice an irreversible change? How about cooking an egg? Challenge yourself to answer these questions and more with this cool science game.