And here are some more:
1. Why won’t the elephant use the computer?
Because he’s afraid of the mouse!
2. Why is six afraid of seven?
Because 7 8 9.
3. Why did the computer go to the doctor?
Because it had a virus!
4. Why did the volcano get the best results at school?
Because it was active!
5. What kind of key does not open a lock?
A mon-key!