Solve Math challenges to capture pokemons (5 to 7 years old). Click on the characters to solve three challenges to capture a new pokemon an level-up. Click on the Pokedex to have a look at your pokemons, take note of your loadcode and load your level back with it another day.
Wikipedia for the extensive list of Pokemon (and so much more). http://www.pokestadium.com for their amazing set of sprites.