Floating Halloween Candles
Pouring Station: an easy toddler activity
Set them lose inside a box - could even give washable markers if you're sure they are contained. Might be more exciting than crayons
STEM Challenge for Kids: Create a pinball like marble maze game using paper plates and other basic craft materials. Fun design and building challenge! ~ http://BuggyandBuddy.com
DIY Musical Instruments - Homemade Fun for Kids | Kids will love making their own musical instruments for loads of enjoyment and learning.