My question is in regard to hobbies, specifically engineering hobbies.
 I want to get into building something detailed enough to be a part
time project, roughly 4-6 hours a week, for a few (2-4) months.  I
live in an apartment so it would also not be able to take up too much
room.  Something up my alley would be building RC (Remote Control)
cars but I am having a hard time finding stores with documentation.  I
would like five websites that sell RC car kits (a variety of them)
with some sort of documentation (hopefully a pdf that details
instructions on how to put them together so I can get an idea of the
detail involved).  I would also be open to other building kit projects
that have websites associated with them.