How to make a steam boat

A pop-pop boat is a toy with a very simple pulsating steam engine, which can be of two types: membrane engine or coil engine. 0:03 tin can 1:27 plan for cutting and folding 4:40 tin solder (can be glued) 5:22 metal tap to be the base of fire source 7:05 tap soldered in the center of the boat 7:13 flexible copper tube for the motor (3/16“ ~ 5mm) 8:25 holes for the engine output 9:00 I moved the lid and the coil forward to balance the weight 9:18 the spiral must be filled with water 9:32 very simple alcohol lamp 10:09 the lamp should be exactly under the coil 10:30 it takes about 30 seconds for the boat to start moving 11:16 engine cover made of spray bottle 11:52 to choke the engine just block one of the exits