On Friday, prepare the snacks in groups of 3s, 1s, and 4s. Put them in small bowls or little cups in those very specific quantities; for example, 3 crackers, 1 cheese stick, and 4 slices of banana. Have each child find one bowl with 3 items, one bowl with 1 item, and one bowl with 4 items and then ask the children to line them up. There you have it. 3.14! Pi Day Snacks.