Things You'll Need
Instructions
Lay the large 7 inch wood block flat on your work surface. Measure three-fourths of an inch from the front of the block and a half an inch from the top surface and mark your place with a pencil. Repeat on the rear surface and on the other side of the block, directly opposite of your other two pencil marks. These will be the wheel placements.
Place one of the wheels over top of one of the pencil markings and drill using a wood screw. Power screw the wheel onto the wood surface using a wood screw, taking care not to drill completely. Leave the wheel slightly loose to allow for rolling movement. Repeat for all four wheels.
Again with the 7 inch block flat, measure to the exact center and make a small cut using the jigsaw, large enough to accommodate the thickness of the measuring spoon's handle. Cut through to the bottom of the block.
With the smaller block on its side, glue the block horizontally, keeping one side near to flush against the cut you made in step 3. This will create a stopping barrier for the catapult arm that will allow for greater firing distance.
Once dry, insert the tablespoon handle first into the slot you cut with the jigsaw