why does play only warrent a half habit?

not to be just like everyone else, but i too think that play is the easiest of the 7.5 habits, and the most fun! and viewing problems as challenges is definitely - a challenge. i can do it, it just takes some convincing myself that i can. so i guess that makes it sort of a tie between habit 3 and 4 . . . having the confidence to view a problem as just a challenge.