Blueberry is finishing up Kindergarten math concepts so we're making sure she has a solid grasp of money values. We found some cute books at the library. Our favorite so far is "A dollar, a penny, how much, and how many?" by Brian P. Cleary.
We did coin rubbings, and wrote the name and value of each coin. Then we did sorting with some play money I found at the dollar store.
If you've never done rubbings, simply peel the label off a broken crayon. Darker colors work best. Experiment with pressure to see what turns out best for you.