This is by far a hit in our house. Trucks - by Duck Duck Moose - is so engaging and visually well designed. There are various "games" to play with different trucks. Our current favorites are loading and hauling piles of dirt and gravel and taking cars through a car wash (after getting them muddy first, of course). It's not free ($1.99) but well worth the money. If you have a boy that loves trucks, this may be an investment you need to make. Enjoy!