Grouping of numbers is an essential skill of creating sets of numbers of objects. It supports learning advanced concepts of skip counting, addition, multiplication, division etc. Keeping with the Presidium philosophy of learning by doing, Presidian of Grade Prep were taught grouping of numbers by various activities. They worked with clay, blocks, etc. to represent groups of different numbers 2,3 and 5. The engagement helped the students in understanding the concept. It also helped develop their fine motor skills and language skills.