I think if you just make it bright and cheer filled any fabric can work, even for boys. It's more what you do with it. I loved the "Frog Pond" and think I'm going to try something like that for one of my nephews (on a smaller scale) and then do a bee quilt for the other nephew. If I could find paper pieced dinosaurs I'd probably do that.
Good luck in whatever you decide to do...