This game playfully promotes an understanding of quantities and numbers and is usually great fun for children. Tap a specific number from 1 to 10 on the child's back with your index finger, for example, four times. The child counts quietly and then says the number 4. The numbers 5 and 10 have a natural connection to our fingers. Therefore, place one hand flat on the child's back for the number 5 and both hands for the number 10. Before starting the game, ask the child how many fingers one hand has and how many fingers both hands have. If the child does not know the answer, ask them to count their fingers. Over time, your child will internalize the finger picture of the numbers 5 and 10. These finger pictures will make arithmetic easier later in the initial lessons by helping children recognize the relationships between other numbers and 5 and 10. For example, children realize in their imagination that the number 6 is one more than 5 and the number 9 is one less than 10. The child then takes their turn by tapping numbers on your back, and you name the corresponding numbers. The role reversal increases the joy of playing together.