Today would have been my dad's 76th birthday. The poor guy, he spent every year enduring practical jokes. Mom's favorite trick was putting salt in the sugarbowl, which Dad dipped into every morning for his coffee. I don't think he forgot every year, which the Mama liked to say. I think he knew how much of a kick she got out of it, and just went along with the gag.
Underwear sewn together, plastic wrap in his ham sandwich, strange phone calls from Mr. Fox (at the zoo)...you name it, he got it.
Here are some other famous April Fool jokes, for your amusement. (And inspiration?) If you want the full top 100 list, here it is, courtesy of the Museum of Hoaxes.
Happy Birthday, Pa, with love from your kids.