1. Scratch Robots Catapult

2. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 1 Parts: - 8.5” x 11” cardboard - 4”x6” Foamie - 1 Starbucks straw - 4 Starbucks coffee stirrer sticks - Paper clip -8” string Tools: -Scissors -Ruler -Tape -Hot Glue Gun

3. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 2 Base: Cut the cardboard base and strengthen it by hot gluing coffee stirrer sticks. Each line on the green mat is 1” square. Therefore the base is 3” x 5”.

4. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 3 Arm parts and rubber band stops.

5. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 4 Base rubber band stops: Hot glue foam strips on the middle coffee stirrer stick on the base.

6. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 5 Arm-1: 1.Cut the rubber band strips and hinge parts. 2.Hot glue half of hinge on arm stick.

7. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 6 Arm-2: Hot glue the 2 nd half of the hinge on the arm. Measure and mark the middle of the base.

8. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 7 Arm-3: Hot glue arm hinges on the base.

9. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 8 Arm-4: Hot glue the rubber band strip on the arm. It should be positioned so it aligns with the rubber band strip on the base coffee stirrer stick

10. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 9 Rubber bands. 1.One rubber band will act as the arm spring. 2.The other rubber band will act as the arm stop to control the throwing trajectory. 3.You can twist the rubber bands to control the spring strength and arm stop position.

11. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 10 Hand-1: Collect these parts to start the catapult hand (or bucket).

12. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Step 11 Hand-2: 1.Cut a slit in the top of the hand 2.Overlap the slit sides to make a pocket. Hot glue. 3.Hot glue the foam piece so it wraps around the straw. 4.Slip the straw hand over the coffee stirrer stick arm. Tape it to the arm. 5.Experiment with arm/hand length. 1)2) 3)

13. Premium Quality Junk Modules www.build-it-yourself.com Catapult – Finished!!!!!! Catapult Trigger 1.Attach a string to pull the paper clip and release the catapult arm. 2.Hold the catapult arm down to the middle coffee stirrer stick with paper clip that has been opened. 3.Tape the base coffee stirrer sticks to a platform. This will keep the catapult stable.