I like the Lego Captain America, well any Lego mini-fig could look geeky cool. As for the flying Superman, what's great about this is not only the fact that it works well for a kid in a wheelchair but that it looks fairly simple to put together. I learned this year about an organization called MagicWheelchair that makes very elaborate costumes for kids in wheelchairs. Each one takes upwards of 100 hours of work, though, so they can only produce 3. That means the most applicants won't get one. When I saw it, I thought it would be nice to also have instructions for simpler costumes that parents can make themselves.