Need some oranizing ideas for my 5 year old boys room?

His room is rather small, but he has plenty of room for organization. I currently have his toys separated in different sized baskets. Every once in a while it gets outta control and we have to go through and separate but he does pretty good at putting stuff where it goes. But I feel like I could do better but don't know what or how. Well actually I know that if I got one of those awesome shelving thingies at potter barn kids, that would be fabulous. But I need something a lil more affordable at the moment. If I could some how get some height involved to organize that would be better. I usually separate his toys as: Big cars and vehicles, little cars like hot wheels, toy guns like nerf and water, etc., sports stuff like baseballs and bats and basketballs etc., books, people like action figures and those disney character people he gets from kids meals etc, a basket for his thomas train stuff, and then a sort of miscellaneous type basket. I have about nine baskets large and small. I just don't like how they're all lined on the floor. I know I need some kind of shelving just don't know where or what. Sorry this is so long!