Use Beeswax to Waterproof Canvas Shoes: I LOVE this one, especially for beach season or rainy season. You can use a bit of beeswax to waterproof your shoes! Just rub the wax onto your shoes, blow-dry to seal, and you’re done.
Moon baloons — Just simple glowsticks inserted into balloons, but how cool. I can see this working as a game like keep the moon(s) in the air or even as stand-ins for planets making a model of the solar system.