Samick Polaris takedown bow 62" Samick makes several 3-piece takedown bows with amo lengths of 48, 54", 58", 62" ("little fox" to "Polaris"), with draw weights from under 15# to over 35#.
Not sure how tall he is, but one of them would be good quality, and flexible to grow with him. I'm not sure of the riser lengths for those models. They be be all the same, or there may be a smaller riser for the 48" version. My wife is 5" tall and she likes to shoot the 62" version with 24# limbs. She just likes plunking arrows in the back yard.
Her 62" Polaris is a nice bow. About $115. Other shorter Samick models are about $10 less. I think it's a lot of bow for the money. Kind of "kid proof" too. Good enough to shoot through the teen years and into adulthood (with 62" Polaris). "Inexpensive" and well-made, not "cheap" quality.