Re: Roping a tube
If they were made for water, I certainly DO NOT believe they are designed to tow. The two eye-lits are not anchors for towing. It does not appear that the other is for water either. The extra chamber could easily be argued as a device used to keep your butt/back off the ground as you slide down the hill that is covered in snow.
***I am going to recommend that you DO NOT even think about towing a child on that tube behind a boat, because I DO NOT believe it is made for water. It's hard to tell what the bottom tube is from the photo, but I DO NOT believe you use those anchors as tow anchors.***
In fact when I look at the whole previous post, I do agree with any of the recommendations. You do not want a child who is learning how to tube to be riding at the "top" of a tube. The tube in the top photo, put the child at the top of the tube without any balance support around them. Get a little off balance and off they go. Water tubes are designed so you can have a child kneel and makes it virtually impossible for them to fall off or out of the tube at slow speeds, unlike your tube in the photo. Many of them also have an extra chamber in the inside to act as a cushion/floor, so they won't get beat up on the water. The tube in your photo, has anchors like you see on blow up canoes. Designed to fit a small rope through, but not to tie a makeshift knot/tow anchor. As far as getting sucked in between the cover and tube, not sure where that comes from????
Now could you feed a rope through, tie a knot and pull slowly behind a boat? I'm sure you could.