Now take 2 popsicle sticks and put an elastic band on one end, but leave the other free.

That's it for step 2.

Once you put the fulcrum and this piece together, it will form the lever. Did you know that catapults use elastic energy? It's true! You have to pull down on the catapult and stretch an elastic of some sort. This creates the stored energy that, when released, sends an object fying through the air!