"Cold" metal and "warm" wood may be the same temperature.

Make your own heat waves in an aquarium.

Create a convection cell inside a CD case.

Objects change size when heated or cooled.

When a piece of iron gets too hot, it loses its attraction to a magnet.

A dipping bird seems to go forever—but it's not perpetual motion.

A fun way to visualize gas molecules in constant motion.

Eggsplore gas properties while making a snack.

Just spew it—build your own cyclic hot water fountain.

Dark-colored materials absorb and emit energy more readily than light-colored materials.