Anyone! A house can't jump.

16

The little alligator's mother

Because they can't dress themselves

The man had the hiccups. He asked the bartender for a glass of water to cure the hiccups. However, the bartender instead scared the hiccups out of the man by pointing a gun at him. Since the bartender cured his hiccups, the man thanked him and left.

Silence

Heroine

The letter M

25

6 years old
1+2+3+4+5+6=21

You have to ask either one of them "Which door would the other one say is the right one?"

Then they both point to one door. The liar points to the wrong door because he does the opposite of the truth, and the truth speaking one will point to the wrong door because he will point to the wrong door.

Tissue