Did you know if you draw on a lightbulb with a sharpie it'll decorate the walls with your designs.
Old tie + button = bracelet!
Calming Jar- Tell child that they need a break and may come back when everything has settled to the bottom
cheap glasses, rubberbands, and frost spray paint - neat
Homemade sprinkler. Take a 2 liter soda bottle, and poke holes in it. Hook your hose up to it, toss over a tree branch and turn on the water!
Spray paint over stickers on mason jars to create festive luminaries!