I share with you this boat I have designed on Fusion 360. It is inspired by greek fishing boats, but i wanned it to look like a cartoon boat, so I oversized some parts.
It floats pretty well so you can use it as a toy for a kid or even try to remix it as a remote controled boat.
You can (or not) print the little buoys to make it more realistic, but you should use a string witch have the same color as your plastic (don't make my mistake).
You can easilly print it without supports, but you'll have to clean it up after the print.
Don't hesitate to share your "make" with me ;) !