Abstract concepts are beyond most preschoolers.
They focus on the concrete, and so should you, showing them what coins look like and how they can be exchanged for other things. At the grocery store Most children get their first look at the world from the seat of a shopping cart. So learn to make the most of the opportunity, and steer clear of some nasty scenes as well. One mom puts a hand-held grocery basket underneath her cart and tosses in items her children say they want. At the checkout counter, each kid gets to keep one thing from the basket.