Ejection Rocket Experiment

ACES Challenge Entry

Gold: Overall winner award!

Gold: Indonesia country award

Gold: Frugal aspects award

Silver: Learning outcomes award

Silver: Playful aspects award

Faiha Zhafira Aftani

SDIT Nurul Fikri



In this experiment, we make a rocket from a paper cup that is decorated with origami paper to form a rocket with a rubber band at the bottom. The way to play it is to press the rocket down on the other paper cup and when it is released the rocket will be thrown like launching. In this experiment we take advantage of the elasticity of rubber bands to propel an object. Elasticity is the ability of the rubber to return to its original shape.

The ejection rocket working principle is when we press the rocket down on the other paper cup, the rubber will stretch and have elastic potential energy. When released, the rubber will return to its original shape and change the elastic potential energy into kinetic energy that makes the rocket launch. The stronger we press the rocket down, the farther/higher the rocket launches as the energy produced is also greater.

Learning and Competency Outcomes

In this experiment, we study the simple science of elasticity, elastic potential energy, kinetic energy, and changes in energy. The stronger we press the rocket down, the higher the rocket is launched, and vice versa. We also learn that the technology used in this experiment is the elasticity. We can also find tools around us that use elasticity technology such as car suspension, bows, spring scales, spring beds, trampolines, and pens. We also teach engineering which involves students assembling parts of the rocket and attaching the rubber. We also learn simple mathematics in the form of geometric shapes. We use geometric shapes to decorate the rocket.

Playful Aspects

In doing this experiment the children will be very happy because they can freely explore decorating the rocket according to their imagination. They can also role play as an astronaut while doing this experiment. The rocket is designed very simply so that it is easy for children to assemble themselves, which will encourage pride in their work. Children are also free to play it or experiment many times to answer their curiosities, such as what is the approximate maximum height that can be reached by the rocket, how to make the rocket fly even higher by pressing deeper, or when the rubber will break when pressed. And of course, it will be more fun when played with friends, they can compete to see whose rocket has launched the furthest.

Frugal Aspects

The tools and materials used are very easy to find around us and the price is quite affordable. It can also be replaced with used materials to learn how to recycle. Like paper cups, they can be replaced with used plastic cups, or plastic bottles with cut ends, used cans, or used cardboard. Origami paper can also be replaced with snack wrappers or directly drawn using crayons or paints. The point is that the use of materials can be adapted to each environmental condition.