Birthday kid gets a ballon avalanche when he/she opens the door in the AM. Pinned this before but this one uses crepe paper to hold the balloons instead Birthday kid gets a ballon avalanche when he/she opens the door in the AM.
Balloon Rockets - I've done this in several science camps I've conducted. Kids have fun with it. But, when the balloon deflates it may fall off the straw because it's surface area changes - another good thing to show and explain to kids.
~ glow stick xylophone ~put the glow sticks in cups of water and an aura comes off in the dark, when you tap them ~ probably the coolest thing ever ~ this would be a fun activity for our first grade SOUND unit ~