This store.
The commercial features a kid riding in a shopping cart (not the kid seat), rocking back and forth, and obviously having a ball. That practice is prohibited in practically every store I know of. Many kids are injured every year riding in shopping carts.
I’m writing a letter.
I’m a grouchy old grampa. 
Peace,
mangeorge
But… but! Grouchy old grandpas don’t write letters complaining about fun yet dangerous practices! That’s the job of interfering grandmothers! As a grouchy old grandpa, your job is to sit around and grouch about how much more fun everyone had when such dangerous practices were allowed!
You’re also supposed to put horrible ideas like treehouses and soap box derby racers into the heads of the yowwens. Why aren’t you out there telling them how an ordinary galvanized trash can lid can be converted into a super-fast downhill sled? Future generations are relying on you to pass on the wisdom of a life lived to its fullest, that only the crocodile jaws of Darwinian selection can provide.
We need the smoldering fire of your grouchiness, now more than ever. Don’t let your fellow grandpas down!
Otherwise it will be necessary to call in the grandmothers.
Interfering grandmothers.
I saw the aftermath of a kid standing on the back of the cart while the sibling was in the seat. He flipped the cart over and the seated kid lost the end of a finger. The mother was pissed and the ambulance came and got the kid. The mother wasn’t really being irresponsible, the older kid just didn’t stop when the mother said too. A few seconds later and the cart flipped.
C’mon, it’s Big Lots! You have to be willing to pay a price for all that cheap merchandise. But if you’re lucky enough to get a cart with working wheels it really is a waste of space to put a kid in the cart.
I’ve never ben to one. I shall make myself a mission to do so. I have been to a Wallmart. Once.