You have searching several ideas for your boy, but they seems to end up in rejection else they just too expensive to afford. The following boys room pictures may be the one that you have been looking for.
They are all awesome and offer more than simple place to sleep. It is true that designing boys room is rather difficult then girls room, but it would not be a reason you will not give them your best.
The following boys room are designed to meet what boys really want to be in their bedroom. You can create the boys room based on certain theme, like sport or army. You can easily find any bedroom theme items in the nearest market. Boys room should be simple and friendly environment. Remember that boys are not good at tidying room, so pick up the simplest design that really states the boys characters.
Images Source: Houzz