Make your own bouncy balls from scratch. This is a ridiculously cool science experiment.
DIY Gak (recipe linked from this site).. my kids would love this stuff.. lol
101 indoor activities to do with your kids
45 Kid Friendly Fall/Autumn Crafts | A Spectacled Owl
paint 6 toilet paper rolls with green, yellow, and blue (washable) paint. Cut the ends of all the tubes into a point, poke a hole through to thread pipecleaners cut & fold over to make joints. Use school glue to glue 2 google eyes & a small piece of red or orange ribbon, fabric, or felt for a tongue to the head.
toilet paper roll snake
Light Sabers using noodles and duct tape! Great for a little boy's birthday party!...