Or as Aviana says: Date Dobs of Dutty Doo!!
The best & easiest activity I’ve ever done–a box of corn starch + enough water to stir it (2 cupsish) + some food coloring + enthusiasm and combine with willingness to clean up the mess= Great Globs of Gucky Goo Fun!
Is it a liquid? Is it a solid? I’m sure there’s a science lesson in there somewhere too.