Whenever DH and I take our little family out shopping, we normally put DD in a stroller and let DS sit in the seat in the cart. This has been working just fine except I suspect that DS gets bored. I have a few toys that attach to the cart for his amusement but because I bring them every time, he's grown tired of them. Does anyone have any suggestions on toys to take while shopping for an active, curious 15 month old toddler?