look at the diamond infinite edge maybe?
you can find full package's on ebay with arrows, release, a soft case, and a bow set up with a sight and rest for around 300 bucks.
draw weight adjustable from 5-70 lbs or something crazy.
My son just bought a Hoyt rage ...it adjust from 16 pounds to 70 ....shoot me a PM ....we did a lot of research I can fill you in if you would like...as for the bow I could not be happier ...he is seven by the way
The last posters kids bow the draw length is way to long.
For kids upto 12-13 the PSE mini burner is pretty sweet and very adjustable so they can grow with it. Same with the Hoyt Rukus. If seen some shops set kids up with the Mission Craze but the problem with them is there so heavy. My bow loves his Mini burner.