This may sound stupid, Allen but as the mum of a geologist I have moved lots of heavy stuff by placing an old sheet or blanket on the floor and dragging it. If it’s just front door to kitchen that is. Your shopping can’t weigh more than the daughter’s enormous rocks!
We have Bakers Dozen's suggestion which we use in the garden; it's easy to pull about and folds reasonably small. Another suggestion is a normal shopping trolley; they also fold flat, more so than the other one, and the bag is large enough to drop 2 or 3 carrier bags into.