- 1). Collect all required materials as listed in the "Things You'll Need" section, and organize them in a manner in which individual pieces are easily located. If one piece is missing, proper assembly of the catapult will be affected and could cause issues with its effectiveness. Arrange the pieces into the three categories listed, and place them on a flat surface such as a table or countertop.
- 2). Partner a five-slot connector with a red rod by sliding the red rod through the connector. Position the connector in the center of the rod and add the remaining five-slot connectors onto each side of the center connector. Join all one-slot connectors to each side of the five-slot connectors. Attach one wheel to either side of the red rod and cap each wheel with the two double-slot orange connectors. This completes the base of the catapult.
- 3). Set aside the small green rod and one triple-slot connector. Conjoin all other rods and connectors in the manner of your choice to create your ideal throwing arm. Length and width may vary based on how high or far you would like your catapult to launch objects, but the throwing arm must consist of four right triangles and two free-ended rods. Attach the free-ended rods to the centered five-slot connector. This will join the throwing arm to the base.
- 4). Create your launch object by connecting the small green rod with the center slot of the remaining triple-slot connector. Attach the newly made arrow to the top of the throwing arm, and check that it is centered and balanced for optimal launching conditions.
- 5). Aim away from anything that could be damaged, pull back and fire your catapult.
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