The bottom of the money box can help to checks, receipts and valuables. ✨ Cash Box with Slot for Kids, Small Money Box with Money Tray & Key Lock, 6″ x 4 4/5″ x 3 1/5″, Blue, QH1507XS ✨. Key Lock: Cash box has a privacy lock with 2 keys to keep valuables safe, it’s perfect for kids to learn to manage money and for adults to take valuables out.