KidsDo is designed for 4 to 9 year-old kids. providing them colorful and bright castle theme and cheerful effects. Exerceses covering basic mathematical skills like addition, subtraction, more or less and arrange number. KidsDo is a joyful counting game for children to learn the fundamentally mathematical conceptions of number and quantity. from random amounts of things in the castle. Kids can collect the 5 of lovely items to help princess from math castle. This lovely small game will not only bring great happiness but good studying materials of fundamental mathematics for your kids.