It is recommended that young kids start with the illustrated games, which are easier, and give a good chance to introduce them to the world of numbers.
In this section, the games try to promote the mental activities related to abstract reasoning and stimulate the artistic capacities of the child.
They will practice numerical games with sequences during all these games, visual memory and recognition of numbers and colours.
http://school-e.co.uk -information about math games-
This great article to learn a bit more about Pipo games (games info)