From: Colleen Juntunen

My oldest learned to count up to 25 at age three by using pennies. He had the incentive of receiving as many as he could count up to correctly. My second son, when 4, used old dead batteries to play a little plus or minus game. My daughter just turned five uses buttons, pennies, and food at the dinner table. Daddy will ask her if she had 5 green beans and her brother ate 3 of them how many would she have. You do not need books to teach math.