I love how no batteries needed. my son loves the play money and credit card. we played grocery store yesterday and he was the cashier. that was fun. then I used the small tablet it comes with wrote out a small amount check I needed cashed. he took check and I told him I wanted small bills. so he had to count out the bills and I had him use the calcuator just make sure he was giving me correct amount. It was fun to see him learning.