Four Pre-Pesach Questions

Since my kids will hopefully be taking care of the mah nishtanah at the seder, I've had time to ponder a different set of four questions:

1) Why is this price different from all other prices? The rest of the year, a 12-pack of kosher string cheese is $9.69 and chicken thighs are $1.29 a pound. Why this month are they $13.00 and $1.89 a pound instead?

2) Why is this cleaning different than all other cleanings? The rest of the year, when you vacuum a room that nobody ever eats in, the floor stays clean. Why this week do new crumbs keep appearing all by themselves?

3) Why is this van filthier than all other vans? The vans of other families whose youngest child is already eleven years old, don't have decaying food and food wrappers over every square inch of the floor. Why did ours?

4) Why are these leftovers different than all other leftovers? The rest of the year, my kids are happy to eat all kinds of prepackaged foods. Why is it that a few days before Pesach, when we're trying to finish off stuff from our freezer, do they suddenly no longer like pizza bagels, blintzes, and fish sticks, or even our drawer full of candy, and want us to go out and buy new chumetzdik foods?? (As if!!)

I don't expect answers, but post 'em if you've gottem, as well as any more questions I didn't think of!