Pick one make.

What do you want to make?

Open one lab. Follow the picture. Check the test before We made this.

• Move · 3–8 · 30–40 min

  Pop-up hinge

  Open the card. A shape stands up. That is a hinge doing a job.

• Move · 2–6 · 25–35 min

  Pinwheel

  Cut a square, cut toward the middle, fold every other point in, pin it on a pencil. Blow. It spins.

• Move · 3–7 · 30–40 min

  Hopper frog

  Fold a frog. Press the back. It hops. Measure the hop. Fold the spring sharper. Measure again.

• Move · 3–8 · 35–45 min

  Paper catapult

  Fold an arm. Tape it to a base. Press and let go. The eraser flies. Measure. Change the arm.

• Move · 3–8 · 30–40 min

  Inclined plane

  Fold a stiff ramp. High end on a book. Slide an eraser. Make a longer, gentler ramp. Which is easier to start? Which is faster?

• Move · 4–8 · 30–40 min

  Paper grabber

  Fold two arms. Join them with a fastener. Squeeze. Pick up an eraser and walk it one meter.

• Move · 2–6 · 20–30 min

  Whirligig

  Two paper disks, a string through the middle. Twirl. Pull. It spins. Count to five.