Hi There,
I know its been a long time since I've been on here but I do lurk, lol, and I couldn't think of a better group of cyclists to turn to for some advise.

My son will be 9 in May and has expressed interest in a tandem bike he can ride with me. He is just over 4' tall and 60 lbs and I'm 5'6" and 160. I don't even know where to start other than it would be on the low price end and we would use it for riding on the road and at most, rails to trails. I have downsized my car to a honda civic so I don't have a lot of room for a bike or a hitch at this point. While all advise is appreciated, here are a couple of questions I do have:

How do you find the right size with such a height difference and with one still growing?

Are the bikes adjustable to accomodate this or are there kits to buy to help with the fit?

Are the folding tandems worth the cost, durable and comfortable?

TIA for all your help!