Things that go

My LQS had their anniversary sale last weekend, so I broke my self-imposed buying ban to get these fun firetruck, tractor, and airplane fabrics. I'm thinking that once we move to our new home, I want to decorate the Monkey's room with a "things that go" theme, and these will be great for the quilt for his big-boy bed. Already, he's been playing with all the fabric (can't you tell? That's why it's so wrinkled!), so I'm thinking this was a good idea. Will have to keep my eyes open for the right patter for these. I'm thinking simple, so it doesn't look busy. Any suggestions?