I loved this day when I was a kid. I even gave this day as a birthday to my cat, Penny, since I didn't know what day she was born on (who, by the way, was named after Penny from Lost In Space – yeah, I'm THAT old).
It's nice to know you can play tricks on people and not really get into trouble because the day allows it. Nothing physically harmful, though. Telling fibs, making up stories, that kind of stuff. (You know, like telling your husband you're pregnant, when it's impossible, but he believes you and panics, because you make it sound so real, so it makes it even more funny when you tell him "April Fools!" because he hasn't checked the calendar and has no idea what day it is).
Yeah, I like tricking my family more than friends (because I get into less trouble that way). I think it works for me because I'm usually such an honest person (I once belched loud enough that people in the other room heard, so I blamed my husband, who was sitting next to me. He denied it vehemently, but no one believed him. That either tells you the type of person I am, or the type of person he is!).
I did laugh at the suggestion I saw on an e-mail to glue magnets to your coffee cup and place it on the roof of your car, right where you might put it as you climbed inside. It would be funny if you could see the expressions you get, but that's not so easy when you're driving, now is it? Plus, I'm not so sure it would withstand my freeway driving, anyway! April Fool's is only fun when you can SEE the reactions (and then say "April Fool's!"). Or am I the only one who believes that?
Here's hoping you have a nice FOOLISH day!