Counting Activities These Counting Activities: Build A Pizza can be set up as cookie sheet activities, a magnet center, or math center. This set includes a building mat, two pizzas to build on without the mat, 12 build a pizza instruction cards (Level 1), 10 build a pizza/make a 10 cards (Level 2), and lots of build a pizza building pieces (all in color). In this activity, students watch the pizza toppings pile up as they work on basic counting skills (numbers 1-10) and following directions