This is my toddler’s favorite game that he devised almost completely by himself. I hoard glass jars and baby food jars are the best for storing small items so I had a bunch of fun jars near my sewing desk. G found them and loves putting lids on and taking them off. I gave him some white buttons I had sitting around and showed him how to put them in the jars. Now he likes to put them in, pour them out, pour them in the other containers, etc. I think I may buy some different color buttons as well so he can work on his colors.
Here’s a big bin of buttons off Amazon: