Re: tubes
Welcome to iboats!
Got some technique advice to offer...
We switched from a donut tube to a flat disk type last year as our son was was wanting a little more control and the ability to kneel up on it. The donut was good from age 5 but he was 8 last summer and comfortable enough to be able to sit on something rather than in it.
One problem we did have and that I read a few posters here also experienced with the "holeless" donuts was submarining on launch. That is, we'd try to ease him up on plane and the bloody tube would head for the bottom of the lake instead. It turned out to be a combination of my launch method and not enough air in the thing. Glad I discovered this as I was ready to return it for a refund.
So, if this happens to you, make sure it's pumped up good and tight without over inflating it and when you launch, hit the gas quick and hard to pop the thing out of the water. Once up on top you can throttle back or whatever, but for me, a slow easy start was definitely not the way to go with this type of tube. That worked fine for the donut but not the disk. Now he wants a wakeboard...
Ah well - just watching the joy on his face as he flips and flies about back there is more than worth the price of admission.
Good luck, have fun and be safe!