1. WeDo Catapult Build Instructions
You don’t have to use this build.
You can create and build your own design or use this one.

2. Catapult on Baseplate with Purple Pompom to Launch

3. Another view of “loaded” catapult

4. Side view

5. Different angle on catapult

6. All the pieces you need for the catapult

7. Attach the two small red and gray cross axle brick to the 5-hole beam

8. Attach the flat white pieces to
the sides of the shorter red beams
so they look like the next slide

9. Snap the shorter red beams onto the sides of the long red beam
Snap the shorter red beams onto the sides of the long red beam. See next slide for how it looks when done.

11. Press the small red pieces on the long center beam.
The slanted ends of the
pieces point away from
the center of the beam and
toward the ends of the beam.

12. Insert the axle.

13. Attach the axle unit
to the arm of the catapult.
The next slide shows how it looks.

15. Wrap the yellow pulley around
the red beams twice to give
a bit of extra support
to your catapult arm

16. Add a little gray bushing
on either side of the axle
for support/stability during catapult swimg

17. Add a couple of LEGO bricks on either side of the base to raise the baseplate.
You’ll add two pieces of gaffer’s tape on the bottom
of those bricks to secure
the catapult baseplate
to the table
when you’re running
the catapult.

18. Pieces for “legs” on baseplate.

19. Pieces assembled.

20. Motor mount –
two yellow blocks in the middle
of the base plate
and along the right edge.
See next 2 slides.

23. Completed base and motor mount.

24. Attach catapult arm
by inserting axle in motor

25. Add pompom and Scratch programming and launch!

26. Scratch programming Code for the PomPom Ball

27. Code for the Catapult

28. Stage/Background code for music

29. Have fun! Make changes!
I know you can make a better catapult build than mine!
Please me your designs and I can add them to this website with your first name.