Kid: So.... I have to use my stars to buy stars? Star: Correct! Kid: Why don't I just use these stars? Star: BECAUSE THAT WOULD BE CHEATING! MWAHHHHHHH!
Builder: So you want your castle to weigh 12,000 lbs on one side and 7 pounds on the other, and all be balanced on a 2x4 King: Yes, And make sure there is a ledge hanging over spikes that I can stand on, and no roof above the queens room. Builder: Sure Thing king!
The next Day:
General: We have three small rocks, now let's take out this large unbalanced castle!