The first 20 lessons are for children with little or no mathematical skills. Children learn fundamental number skills including number recognition, number words and counting. The Mathseeds characters led by Mango introduce a range of skills including recognizing the shape of each number 0-10 and one-to-one correspondence. Children are also introduced to the four basic 2D shapes: circle, square, triangle and rectangle, colors and some simple concepts of size: big, small, short, tall etc.