I hope this makes sense, my twins are 9 months old and sitting up on their own. My question to you guys is, what do you do when you go to a store with your twins, do you keep them in their double stroller or do you put them in the shopping cart? If you put them in the shopping cart and there is only one seat where do you put the other twin? Sorry if this is a stupid question but I’m so sick of using the double stroller and pulling a shopping cart at the same time.