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Indoor activity

String Zipline Courier Mission

Build an indoor zipline and send tiny rescue parcels across the room using a straw carrier, then redesign the route for faster deliveries.

Ages 5-11 0-1 hours Education 8/10

Materials

  • Markers
  • Paper
  • Paper Clips
  • Scissors
  • Straws
  • String
  • Tape
  • Toy Dinosaur optional

Illustrated Steps

1

Build the Carrier

Cut a short straw section, then tape a folded paper pouch with a paper-clip hook underneath it.

2

Rig the Zipline

Tie string high-to-low between two points and slide the straw carrier on before final knotting.

3

Launch Missions

Load a message and release from the higher side, then tweak slope and tension for faster runs.

What You’ll Create

You will build a mini zipline delivery system that carries tiny messages and toy cargo from one “mountain base” to another. It feels like a secret rescue mission where engineering choices actually change performance! 🚚💨

Have fun!

  • 🦕 Deliver a tiny Toy Dinosaur passenger and build a rescue storyline.
  • 🏁 Race two different carrier designs and compare travel times.
  • 📦 Add challenge rounds: fragile package, heavy package, or exact landing zone.
  • 🔁 Re-route the line through different rooms for a longer mission map.

Why It’s Amazing

  • Physics in Action: Kids experience gravity, friction, and slope by seeing speed change instantly. ⚙️
  • Design Iteration: Small tweaks (line angle, pouch size, weight) teach test-and-improve habits. 🔁
  • Problem Solving: When the carrier sticks, children diagnose and fix real constraints. 🧩
  • Communication Skills: Mission messages turn engineering play into collaborative storytelling. 💬

Pro Tips

For ages 3-5: Let them launch and receive while an adult builds the carrier and line setup.

For ages 5-8: Have them predict which change will make it faster before each test.

For ages 8-12: Track distance and time to calculate average speed, then optimise for efficiency.