I did this to my brother.....
Okay, so you need to understand that he is terrified of clowns. Now when I say terrified I do mean freezing up in near tears fear. Now that you know that you might think it was kind of mean of me to do this but it is too late.
So we have never really done anything for April fools day before, so he didn't think anything of me saying, "Hey bro I have something for you." he just smiled and said, "Oh that's nice, thanks." So I gave him a box, he opened it to reveal this really scary looking porcelain clown doll.
When he looked up at me with fear evident on his face I said, "The guy who sold that to me said that it walks and talks with no batteries required!" He looked at me like he had just bitten into a lemon then he closed the box with a quite, "Thanks." then walked away.
Later that day I walked outside to see him BURNING it. I walked up to him with a hurt expression, "I thought you liked it." I had whispered in mock hurt. He looked at me opening and closing his mouth a few times looking unsure of what to say. I just crossed my arms and walked away.
So when I was in the house I quickly ran out the other door and bought another one exactly like it.
At night, when I knew for sure he was asleep, I crept into his room with the clown and set it beside him. So the first thing he would see would be the face of his worst nightmare.
I woke up yesterday morning to his scream. I couldn't help but smile at myself. I walked into his room to see him leaning against the wall opposite the bed terrified. I smirked at him and yelled, "April fools!"