Well, the Simpson's toy had to be removed. It was laughing loudly every time I even got NEAR the lunchbox, and I was afraid it would give away the joke too early (like, before she had even left for school.) So instead, I buried it in her backpack. Again, really feeling sorry for her teacher tomorrow.
I was wishing, as I cleaned up the kitchen just now, that people in my family drank milk. Or even just ate it on cereal. How funny would it be to dye it black, so when someone poured it on their cereal in the morning black milk washed all over their breakfast? Awesome. I'm generously giving this idea to all you procrastinators out there, who haven't planned your jokes yet. You know who you are.
Then I thought I could have made sugar cookies with black frosting (we do this every Halloween) because it dyes your poop a weird greenish color. The problem here is that it takes a day or two to work through your system, and would be too unpredictable as to when the joke would hit. You might miss April 1 all together.
A more direct approach is to go the Methyl Blue route, as Laura and I were fond of in college. You can buy it at any decent pet store, and bake a batch of brownies with a large amount in it. We had lots of fun with this, April Fools day or not. Later on, though, we heard the stuff was radioactive or toxic or something, so we had to cut it.
Ashley (of the jumprope workout) and I were concocting some fun ideas for jokes on our husbands. She suggested finding a pregnant lady, getting her to pee on a pregnancy stick, and then showing her husband. I took it one step further and thought for maximum effect, you could collect the pee and hide it in your bathroom, so you could open the test, go in, and come out and watch it develop together. Of course this would take a lot of prep work, and if I did it to Travis he would just be happy and excited. Not nearly as freaked out as I would be if HE told ME I was pregnant.
Anybody else got some good ones to share?