🚁 Pull the string and watch the helicopter come to life!
As children pull the helicopter forward, the front wheels drive an internal gear system that spins the large top rotor just like a real helicopter. A fun interactive toy that combines movement, mechanics, and imaginative play in one simple 3D print.

Designed to be fun, durable, and easy to assemble — perfect for kids who love vehicles and moving toys.

Step 1:

Slide the gears onto the 2 shafts.

Step 2:

Insert the shorter shaft into the helicopter body and place the second longer shaft as shown in the picture.

Step 3:

Close the bottom part of the helicopter.

Step 4:

Insert a shaft into the rear part of the helicopter and place one small wheel on each side.
Place 2 large wheels onto the shaft in the front part.

Step 5:

Attach the large rotor to the upper shaft and glue it in place.

Step 6:

Attach the small rotor to the small shaft and insert it into the rear part of the helicopter.

Notes:
Make sure the gears rotate freely before closing the body.