Young child mode?

My grandson is 5 years old and loves playing STK on Ubuntu with me. I steer while he accelerates and operates all weapons.
He's too young to play by himself, and I don't have the time to unlock all tracks in challenge mode.
So he stares at the locked tracks and gets completely frustrated at not being able to see them.
although he enjoys the competition, he loves just driving around the tracks.
Is it not possible to include a "Child Drivethrough" so that children can enjoy STK until they are old enough to race on their own?
He's too young to play by himself, and I don't have the time to unlock all tracks in challenge mode.
So he stares at the locked tracks and gets completely frustrated at not being able to see them.
although he enjoys the competition, he loves just driving around the tracks.
Is it not possible to include a "Child Drivethrough" so that children can enjoy STK until they are old enough to race on their own?