Kind of a pointless challenge, seeing as there's no gameplay involved. Sims in boxes with flamingoes is not a game.
You have to place the flamingos first, though, before you move the sims into the lot, so you can't start with them in the boxes. Thus there is the problem of properly positioning th flamingos, and getting the sims in position to kick them. You'd also have to make sure your sims are mean and sloppy, so they won't put the flamingos back up.
I like that this one is more of a race v. other MATYzens.