Make A LEGO Rubber Band Car

Build Batman’s car with this cool LEGO rubber band car STEM project! My son wanted to make Batman’s bat mobile out of LEGO, and we have always wanted to try building a LEGO rubber band car! Find out how you can combine the two to make a fun self propelled vehicle.

LEGO Rubber Band Car Superhero STEM Book Inspired Activity

LEGO Rubber Band Car Project

A LEGO balloon car is also easy to make!

Supplies:

LEGO Pieces
LEGO Crazy Action Contraptions Set {If you don’t have a supply of technic pieces, this is a great inexpensive set with lots of fun ideas}
Rubber Bands
LEGO Batman {or other superheroes}
Batman Books {these are a few of our favorites}

Specific LEGO Pieces To Make The Bat Mobile:

You can see in the two pictures below some of the simple pieces we used to create this LEGO rubber band car and bat mobile.

2 axels
4 wheels
1 flat piece with holes that spans the width of your car
2 long bricks with holes in them to make the sides of the car.

The two important pieces for the rubber band car are the gray piece on the axel show below and the black peg in the blue piece shown below. Use your imagination for the building the rest of the car!

TIP: You do not have to use the exact pieces below. The key points to remember are having two fixed points. The fixed point on the axel must not spin freely, it must be on their tightly. Otherwise, the rubber band can not wind up properly or release properly.

You can turn the black wheel of your LEGO rubber band car to wind it up or you can pull it back on the floor to wind it up! Let it go and see how far it travels.

How To Make A Rubber Band Car Go Far

Don’t want to use LEGO pieces? Here’s another way to make a rubber band car.

Turn this activity into an experiment by building different size cars or trying out different size rubber bands. Test which car will go the furthermost. Use a tape measure to record the distances traveled by each!

This is a nice simple model for a young child to explore making a LEGO rubber band car. He could easily manipulate it with his fingers.

Next, he’s hoping to make a flying LEGO bat thingy. I am sure we can figure something out! We have also used our favorite superheroes to make a computer-free coding game for STEM.