One day last fall as I realized Sweet P really loved shopping carts, I had the idea to create her own grocery store. I started saving boxes and containers from food we ate and her grocery store was born.
We have a little blue cart from IKEA that worked great as a cart, but she got her very own shopping cart from Papa Ray Ray for Christmas (now she uses both).
She loves to play grocery store. She puts everything she wants in her cart (yogurt is ALWAYS in there) and comes to check out ("Will you check me out please?"). I scan all her stuff, tell her the total and help her bag her items. After it's all bagged, she pushes her cart with her bag on her arm to her "car" (aka the futon in the basement). And she ALWAYS has a baby in the cart as well.
This was such an inexpensive way to make play food for her and the containers are great for opening and closing activities. And as we do more with math this will be a great way for her to learn adding. I like to think it also shows her how we can reuse containers and boxes from our food.