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.
Diy Cardboard Slide ~When I was a kid, we did this! ***One improvement: make the cardboard about a foot narrower than the stair width, so that there is space for the kids to climb up on the stairs rather than the cardboard slide.
Re-use plastic bottle tops to tightly seal food bags. Cut off wide-mouth plastic bottle top just at crest. save the cap. slip over bag opening. top toward the open end. Fold bag over bottle mouth. cap with re-used bottle top. easy to seal and pour!
Do your toilet paper rolls stack up like ours do? Well, there are brilliant toilet paper roll crafts for you to do with your kids. It& a great way to re-use them. We& rounded up 18 ways you can create awesome things with toilet paper rolls.