another post from me I asked my son who is now 11 what his ideas would be for a theme room for a young boy...these arent MY ideas, BUT my sons !! Here are his ideas =
Space theme - stars, planets, aliens and such
Star Wars theme - either new star wars or the old school
A historical period - Like ancient Greece (he just studied ancient Greece so he is really digging this theme, which might be better for an "older" child. Medieval is also a fun suggestion (my idea) include a dragon and some knights...be careful it doesn't end up tooo princess like.
A science theme - make him brainy with loads of cool science type things (LOL, I would have given an example but he couldnt think of one)
Math theme - lots of math formulas
Robot theme - all silver and with flashing buttons, could be the cool old 50s style or something more modern.
The World - get one of those huge whole wall maps and cover an entire wall in a world map, it makes for endless hours of learning about the world we live in.
Jungle theme - exotic trees, monkeys and parrots
of course there are all the "lame" normal commercial ideas as well like - race car, trains, army, cowboys and Indians, and superheros. Personally I find some of those kinda offensive and pigeonholing as far as what boys are "suppose" to like and what they aren't...but that's just my opinion on it and its certainly not my room.
Best of luck This is fun!!