Little Tikes Walker/Stander doubles as a Mail Cart and has three letters which work interchangebly with the Little Tikes Mailbox. Mailbox makes music. Mailbox takes batteries in the bee - which is where sounds come from. Mail Cart needs no batteries. Smoke-free, Pet-free home. Sold as a set or can sell separately ($10 Mailbox, $15 cart). If sold, this ad will be removed. If ad is here. Items are both available.