Attach the launcher securely to the base
Place the rocket body onto the launch rod
Make sure all connections are tight and stable
Safety Tip
Choose an open outdoor area. Keep away from buildings, trees, and people.
Fill the water tank at the bottom of the rocket to about 1/3 to 1/2 of its capacity
Too little or too much water will affect the launch height
This step is important—it directly impacts how well the rocket launches.
Use the foot pump to add air to the pressure chamber at the base
More air pressure = stronger thrust
Do not over-pump
The launcher can usually be tilted to adjust the angle
Recommended angle: 30°–45°
Different angles create different flight paths
Want it to fly higher? Tilt the launcher slightly upward
Want it to travel farther? Use a lower angle
Once the water and air pressure are ready
Release the launch clip
The rocket will shoot up using water and air pressure
Step back to a safe distance before launching and watch it fly!
The fun of the Water Jet Rocket comes from experimenting and making adjustments.
Different water levels lead to different results:
Too little water → not enough thrust
Too much water → not enough air pressure
Right balance → higher and more stable flight
More pumping → stronger thrust
Less pumping → gentler but more stable launch
Trying different pressure levels lets kids see how it affects the launch.
Lower angle → longer distance
Higher angle → greater height
Medium angle → balanced result
Encourage kids to test different combinations and compare the results.
This Water Jet Rocket is great for:
Backyards, lawns, and playgrounds
Family outdoor playtime
STEM learning activities and classrooms
Playing with the Water Jet Rocket is simple:
Assemble
Add water
Pump air
Adjust the angle
Launch
Observe the result and try again
The process is easy to follow, and the more kids play, the more they understand how changing different variables affects the outcome—helping them gradually build problem-solving skills through hands-on experience.
E-mail: sislandtoys@sisland.com