So here is a cleaner, and easier alternative!
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Step 1: Grab some tennis balls
You can get tennis balls at the store for about 50c each or about 25p.
Step 2: Preparing
Step 4: Almost done!
Step 5: A few notes
- You will only be able to fit a certain amount of balls on the door.
- In this picture alot of balls fell off the door because there were too many on there!
- Try and fit as many on as you can, but dont be too ballsish! (Pun intended)