Thanks Dirtyskids for reply but all sorted
School hols and kids didn't want to wait, they are Frothing
Keep the froth going ,think there,s an adhesive center fin you can get from slingshot that will stop the sideways drift you,ll get on a sup.
Nice, well done! Also check out the Metro Juniors on Facebook so he can sail and learn with other kids.
Suggest to lower the boom by at least 10 cm, it makes things much easier. For a kid that size I would put it just a bit above the black strap. Just enough so their hand fits between the strap and boom for tacking.