I realize this is an old post, but from personal experience (and I am not speaking necessarily about children) hooks are very plausible as a) they prevent over stacking b) gives the towels a chance to dry c) actually can look tidier as there is no need to fold/drape d) also purposeful for hanging a bathrobe or your clothes while bathing or even a small bathmat if floor space is tight. That said; for easy hanging of large bath sheets due to their length; I have sewn on a colour co-ordinated loop (double fold cotton bias tape found in the sewing notions) about mid way down on one side. Re style; just ensure you choose a hook that has a reasonable projection and has some sort of a stopper at its end and experiment with its spacing if using more than one. Oh, should add for those with the same question and have limited space for mounting; you might wish to look at a swivel type of hook as well that have more than one arm/hook.

Is there any reason not to use robe hooks instead? Many of them look better to me, but they also need to hang onto the towels. The white rubber tip is ingenious, but I'm thinking about how they look when empty (these would be for guests, they could also use them to hang up their clothes when showering.) I have also thought of sewing the loops on the towels, but it seems like that would make them hang even more compressed, and less likely to dry. But in our climate, if you stay so long your towel smells moldy, it is probably time to go home! (But I have lived places where that seems to happen almost immediately, so your mileage may vary) Are some shapes better than others for keeping the towels on? At my in-laws, they fall off before you even turn around, so it's something I'm sensitive to.

The hand towels in my guest bathroom / powder room get very wet. I think my teen son uses them to wash his face. I plan to remodel my son's bathroom next year. The first picture below is of my remodeled guest bathroom. In this room, the toilet is next to the vanity, so side of vanity was obvious place to hang TP holder, not a towel. Contractor was reluctant to hang the towel bar on the wall because the towels cover the electrical outlet. In my master bathroom, I have no towel bars, so hand towels sit on the counter. The layout in my son's room is more like the "By the Bay" Houzz photo above, there will be space for a towel bar on either the right-side side of the vanity or on the wall to the left (as in the "Art House" Houzz photo). But ... I'm thinking about keeping a medicine cabinet on the wall, so would be crowded to add a towel bar here, as in second photo below, taken at an open house in my area.

I've struggled with this for years. In a small bathroom used by only two people. A solution has eluded me, to the point that I have accepted that there is no good solution for a small bathroom. What is working is draping one towel over the shower door to dry and the other one spread out and draped over a kiva ladder that leans against the wall. Tacky, yes. But preferable to having to deal with Wet Towel Stink Syndrome. Even if a double bar exists (that has enough separation to hang full size bath towels to dry), the projection from the wall would kill the deal in a small room.