We started by turning the furniture upside down and freezing their bowls of cereal. Once they discovered the frozen cereal, I gave them new bowls but with food coloring under the cereal, so the milk changed colors when I poured it.
I also saran wrapped the toothpaste tube and squeezed dish soap on the inner rim of the toilet so it would fill with bubbles when they flushed. There were a couple other gems during the day, but the last one was our backwards dinner/dessert. It was so fun! Dinner was "grilled cheese" - slices of cinnamon swirl pound cake with orange-dyed icing in between. Then I buttered the bread and grilled it like a grilled cheese sandwich. Dessert was "cupcakes" - meatloaf with mashed potatoes on top and a cherry tomato. The kids loved that we got to have a treat before dinner. :)
We cannot let our suspicions and our doubts run wild, or else we will destroy ourselves.