I ordered these counters for a childs third birthday. I had previously order a slightly different set for my own son age 4. I find these counters fantastic for sorting, learning colours, counting and basic addition and subtraction. I've also used them with my older kids to help visualise maths homework. I used these years ago as a teacher and am so pleased they are now available to buy from Amazon. My children also love playing with the counters and lining them up and generally playing with them. look out for the different sets which include fruit, dinosaurs and farm animals .