I know I'm late but it might help some others.
Here are some input from me:
1. Why do Jedi always burn their pancakes? Force of habit.
2. Where do Wookiees eat? Chew-baccafe.
3. Why was Yoda afraid of 7? Because 6, 7, 8.
4. What’s a droid’s favorite style of music? Techno.
5. What do you call a Sith who won't fight? A Sithy.
A tip: If you want to create more of these, you can use this "Pun Generator."