What a fun project to do with my 3 year old!! Mila loved it! We spent about 3 hours playing with it! And most of the time she was occupied and didn’t need my attention. And we have a beautiful piece of artwork to hang on the wall!
Other ideas: counting containers, making shapes, drumming on containers, name colors, “pushing buttons”, shaking the tray, stacking them. Mila’s ideas were “pushing buttons”, making shapes (she called it “puzzles”) and drumming. We also played with scotch and painted ith sand on the tray.
If you are interested to try those, here is several links to similar ones!