This is Henry’s favorite art activity. We do it weekly now and he absolutely loves it every time. What makes it so fun for toddlers is they are actively involved in the process, and the result is fast, unexpected, and different every time (but still pretty!)
Two essential supplies here: washable paint and a salad spinner. I never use my salad spinner for actually spinning greens so now it lives in our craft supply bin where it serves the primary purpose of producing spin art. But if you wash it well, you can use it for both.
The bowl does get really messy but it’s contained neatly in the spinner and washes out really quickly and easily