Engineering & Building projects

5 projects for age 9 · page 1 of 1

Projects

Ages 5–11⏱ 25 min

Balloon Ghost Zip Line

When air rushes out of the back of the balloon, it pushes the ghost forward along the string. That is Newton's third law in action: every push has an equal push the other way, the same idea that launches real rockets.

Engineering & BuildingSpace & Flight

Ages 5–11⏱ 60 min

Cardboard Marble Run

Gravity, slopes and speed - steeper ramps make the marble go faster.

Junk ModelEngineering & Building

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Ages 6–12⏱ 35 min

Climbing Spider String Toy

Pulling the strings one at a time makes the spider climb because the angled straws grip the string with friction on one side and slide freely on the other. It is a hands-on way to explore forces, friction and angles.

Junk ModelEngineering & Building

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Ages 8–12⏱ 60 min

Egg-Drop Challenge

Cushioning and slowing a fall (forces and impact) to protect a fragile object.

Engineering & Building

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Ages 7–12⏱ 30 min

Balloon Hovercraft

A cushion of escaping air reduces friction, so the disc glides almost freely.

Kitchen ScienceEngineering & Building