![]() Add 2x1 brick "stoppers" to the catapult arm. Feed the axle through the axle holder, then the arm, and through te second axle holder. Use two 1x2 bricks to connect the longer bricks together.Ĩ. You might have to connect the yellow bricks (as shown) so they work as one long brick.ħ. Find two long bricks with holes in the sides for the catapult arm. Get ready to feed the axle (a long stick) through the holes.Ħ. Place the axle holder on top of the frame (as shown). Build the frame that will hold the catapult arm axle.ĥ. ![]() Be sure to leave some of the 1x8 bricks hanging over the ends of the frame.Ĥ. Place two 1x8 bricks parallel to each other on top of the frame. Gather four flat bricks for the catapult frame. Collect a rubber band and these plastic building bricks.Ģ. Ready for a more advanced catapult? Try building one that uses a rubber band instead of your finger to launch your payload.ġ. Remember, engineering is about observing and making adjustments. Adjust the basket's location on the arm.Experiment with different brick sizes to make your basket.Test that the base, arm, and launch basket are secure by pressing a few times on the elevated side of the catapult. The end of the arm should stay elevated until you provide the energy to launch an item from your catapult!Ħ. Place the launch basket on the catapult arm. ![]() Leave room on either side for the launch basket and for your finger to press the arm.ĥ. Place a long flat brick on top of the catapult base. Place two 2x1 bricks on top after attaching the wheels.Ĥ. Feel free to substitute similar pieces if necessary.Ģ. You can use similar size bricks if you do not have the exact bricks and Legos in the images.ġ. Use the images below to build your Lego brick catapult. Failure is part of the engineering process! Learn from each attempt and try again. Here's one of the cool things about engineering-when something doesn't work, you can keep changing and adjusting until it does work.
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