sorry sari completely forgot about this thread.

had a better idea don't bother with plays. what you want to do is create a really strong fundamental team at that age. what you want to do is set them up in a 5 out formation. if use a rotation system then everyone can paly everywhere at that age i can safely assume you will have very few if any players that will be ina definate set position. by using a 5 out rotary set up you will be able to get everyone comfortable with perimeter play and posting up. it will also teach shooting, passing, getting free, dribbling, screening/picking and so on and so forth.
although this may seem a lax and easy approach this will be much better for your players in the long run as they will have a more rounded game.
this is how we run youth teams in England and Europe which is why we produce 7 footers that shoot 3's like your best small guards. trust me on this although you may have a few dodgy results to begin this will make your players very rounded and very good and i can honestly see more of them playing better higher level ball later on.
if you want more info on the 5 out rotary system just tell me and i will post up the ins and outs of it.