Day 1

I learnt how a bicycle and a dynamo is able to produce electricity to light a bulb. When the bicycle wheel is spun, it spins the dynamo. As the dynamo converts kinetic energy to electrical energy, it is used to power a bulb or charge a battery. As most third world countries have a shortage of electricity, this could be used to help them generate electricity, even though it might be costly to set up the project. From this project, I learnt how a dynamo works and its internals that allow it to convert kinetic energy to electrical energy.

I also got to learn how a pop pop boat works. The boat uses heat generated from a candle to heat a small aluminum box (boiler), which is connected to 2 straws. When heat is applied to the boiler, water in the boiler evaporates into steam. The expanding steam pushes some of the water in the exhaust tube, propelling the boat forward. The steam bubble then condenses, creating a vacuum which draws water back in through the exhaust tube. The cooled water that is brought back into the boiler is then heated and evaporates into steam, and the cycle repeats. From this project, I learnt that water pressure allows the boat to move forward.


  1. It sounds like you have having fun! :)

  2. It sounds like you have having fun! :)