My son will be 3 end of march. He loves playing on my iPhone games in the car on the way to and from nursery. I want to get him something for when we do long journeys from Cornwall to Liverpool, He has a car DVD player but theres only so much he can watch! I really want to get him something that he will enjoy. Hes very good at memory games and puzzle solving but I have no idea what to get?! Help me please! Many thanks 