This year I totally remembered. I created all sorts of Tom Foolery around our house. It was fun, the kids thought it was so cool and they began coming up with their own ideas of what to do to their teacher, or the kids at school.
I changed out the cereal in their cereal boxes. In the Cheerios box was Fruity Pebbles, in the Honey Bunches of Oats was Cinnamon Buns Cereal and so on. :) They also thought they were drinking strawberry milk, but it was just food coloring that made the milk pink.
In their shoes was an Idaho Spud. . . not a real potato (which would have been funny too), but a candy bar spud and in the other shoe a Push Pop. I thought the kids would stick their foot in their shoe and find it, but they saw it before they put their shoes on.
When the kids got home, I had a few more. I wrote a funny message on toilet paper in the toilet and put a little piece of tin foil under the faucet for a funny surprise.
I put a note on their door from the "Health Department" that everything had been destroyed because it was deemed a health hazard.
All this tom foolery brought a lot of happiness around these parts. :)