Show Me the Money
Kids love to imitate their parents; next time you are ready to replace your wallet, hang onto the old one (or purchase an inexpensive wallet) and fill it with expired IDs and frequent flyer cards, faux credit cards from promotional mailings, etc. Laurel loves loading and unloading her wallet and pointing out the ridiculous number of expired university IDs her parents have collected. She also loves filling up the wallet's change pocket (supervised of course…), naming all the different coins as she goes.
The only problem now is that she has started requesting paper money.