A couple of fun online kid's games for boys include "Monster Jam Destruction" and "Pigeon Plopper Flying Game." Both games are available on HotWheels.com to play for free.
“Monster Jam Destruction” lets players drive monster trucks over objects on a track. A player uses the arrow keys to maneuver the truck right or left and the space bar to jump. The more the player stomps on objects in his path, the more points he accumulates.
In "Pigeon Plopper Flying Game," a player uses the keys on his keyboard to fly a huge pigeon over the town, plopping poo on the bad guys. Each level offers an allotted amount of time to hit a specific number of bad guys. The bird must navigate away from obstacles such as clouds.