A pop-pop boat is a toy with a very simple heat engine without moving parts, powered by a candle or oil burner. It was patented in the UK in 1891, but may have precursors dating to 1880. The name comes from the noise the boats make. You may recognize this fantastic toy as a putt-putt boat, crazy boat, flash-steamer, hot-air-boat, pulsating water engine boat. Around the world they may be called Can-Can-boot, Knatterboot, toc-toc, Puf-Puf boat, Phut-Phut, or Pouet-Pouet.
This cool classic toy is sure to excite both young and old alike. Often seeked out as collectors items this new Pop Pop Candle Boat comes equipped with the boat, 3 pieces of wax and spoon to fuel your fun!


Construction and Science of the Pop Pop Candle Boat
The boiler is basically a flat bowl covered by a membrane. The two pipes come out of the bottom and go to the back of the boat. Water is filled into one pipe end till it comes out of the other. Then the thing is put into water (without letting air go back into the pipes). Now the burner goes under the boiler and the whole thing starts. When the water turns to steam, it pushes some water out of the back ends of the pipes. The steam that expanded into the pipes cools down and condensates. The vacuum sucks water back into the pipes. One cycle is finished and it all starts over again.
Now the question is, WHY is the boat moving forward? One should think that pushing out water and sucking it back into the pipes should keep the whole thing in balance or just make it vibrate. But it really moves! So there is no balance of forces but instead the force (relative to the boat) created by the water pushed out is greater then the one created by the water sucked in. The reason is the focus and direction of both.

Box Size: 6.00in (15.24cm) x 4.00in (10.16cm) x 2.00in (5.08cm)

Recommended for ages 7 and older.

Weight: 0 lb 4 oz ( 0.11 kg )