Try the aquabuddy... my 10 year old had been struggling to get up all season and was so frustrated to the point of loosing interest. Bought this bad boy and he was up right away... he only needed it one more time out before he was pretty consistent in getting up and now he doesn't want to quit! I think you could probably use another floaty or a tube but this thing is super slick and you could use it for other learning kids or even adults.
https://www.overtons.com/rave-aqua-b...er-314026.html
My son also rides the Phase 5 Scamp board... it's a solid board for kiddos all ages/size from what we've experienced.