Copy and laminate the large truck cards. During group time hold up a card and ask, "How many blocks do you think are in this truck?" Then, count them together. Explain that the number on the truck matches the number of blocks loaded in the truck.
After you have talked about each card, provide the children with Lego blocks or colored bear counters to place on the squares, creating a truck load of blocks or bears. Numbers used in this unit are 1-10.