They told me they were making me breakfast... put salt in my coffee, Tp'd my laptop, drew eyeballs on everything in the fridge...

So this year I gave them every gross candy I could find (which they still ate, gross) chocolate dipped some mini-onions and made truffles, put random crap in the plastic eggs - like monopoly money with rude comments written on them, dog kibble, a rock, plastic spider, and one or two just empty ones!

The truffles were the best, my daughter took a huge bite and nearly puked!

He wasn't joking but I told him he should have chosen a different day.

This has happened twice in the last few years, either on Mar. 31 or Apr. 1. My brother was telling me about it and I said surely this is a case for Snopes. But no, it's for real and you can get the real story if you Google it.

Long story short, paramedics had to be called in.

This was a college dorm thing, not necessarily for April Fools.

Eww.

Messy, but harmless.

Before we start, read: https://en.wikipedia.org/wiki/Tempest_(codename)

In the Army, the IMO is in charge of all the unit's computer assets.

We had received a lot of new computers at the end of March, and on 1 April our IMO put out a "security bulletin" that claimed the new machines were a TEMPEST hazard. Fortunately for us, extensive testing had been performed and the hazard could be mitigated by the installation of a .003" thick polyethylene plastic shield, and even more fortunately that was the exact plastic that standard 44-gallon Army garbage bags were made out of.

By the time noon chow rolled around, every day worker in the entire field station had put his or her new computer in a garbage bag.

the sheep herder effect.

This is great. It is funny and harmless.
I declare the winner!