Lava changes color as it heats and cools. Crazy Aaron's Super Lava thinking putty is just as cool but a lot safer to handle! Crazy Aaron's putty is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers, so it's great for stretching, molding, and playing by kids and adults alike! Made in USA. Choking Hazard - Small Parts Not for children under 3 years. Tin contains 3.2 oz of putty.