My GT DS8 recently found out that he can get a helium filled free balloon at grocery stores if he asks to a store person. Ever since, every grocery store visit has been associated with a balloon collection. I got so annoyed that I suggested to buy him a pack of balloons and an air pump if he stops asking for free baloons at the stores. He refused it only because his balloons should be helium filled and float nicely.

He told me that balloons have tiny little holes. Balloons eventually deflate and no longer float since the air in the baloon leaks out slowly from those holes, ahh. He's also a big fan of ballons tower defense computer games...