A free program for Android, by Musteren.

The Kids Math and Numbers game is an educational game that aims to teach preschool children and elementary school students the basics of counting, addition, subtraction, multiplication, and division. It is designed to be fun and easy to play, even for children who have never before been exposed to math concepts.

The game consists of eight different games that can be played by a child. In the first game, the child is asked to count from 1 to 20 using various animals (a frog, two snails, three woodpeckers, four crabs, five butterflies, six squirrels, seven badgers, eight fishes, nine small fishes, ten bees, eleven ladybugs, twelve gulls, thirteen starfishes, fourteen fishes, fifteen fishes, sixteen dolphins, seventeen fishes, eighteen balloon fishes, nineteen penguins, and twenty pelicans).