Do you have any pictures of your boats? The trimaran sounds interesting.I've built both a sailing kayak/trimaran and a sailing dinghy. These basic design canoes are great projects and are surprisingly easier to build than some people think. (I expect that the duct tape is a temporary fixing while the epoxy in the joins cures off). This design is quite stable and carry a sizeable load. For extended cruising they need a bit of fitting out with a decent seat or two, and maybe a rudder etc. but for a 2-3 day trip this design will do the job quite nicely.
Simon you should be ashamed! Making your daughter do all the paddling like that!:_risata: