Another huck finn raft ?

Question

For this, i am looking for some way to use totally natural materials to make some kinda way to move the raft by itself. i don't wanna get into the engine n mechanical things b/c i don't have much time for this...so i can't do the trial n error thing either. plus i can't go out n buy a bunch of stuff idk how to use. so if sum1 knows a useful way to make the raft sail--also since it has to be like Huck finn's actual raft, i can't just have a sail....i want to do sumthing underwater...someting no one can see. b/c i m gonna make it look like it's actually oars on the top. so plz reply if u have suggestions.

Answer 1

Rig the oars to actually turn flywheels, which would turn props or paddlewheels.