If You Teach Your Kids to Sign "Please"

If you teach your kids to sign "please" they are probably going to find a treat they aren't supposed to have. When they find that treat, they will fuss and cry asking to eat it. Fussing and crying without getting the treat will remind them that they have a "superpower" to use. They will sign "please" and look super precious while doing it. When they sign please, you will give in because they are so cute and such a good little signer. After they get a taste of the treat, they will probably insist on consuming the whole thing. 

Once the treat is finished, they will remember that crumbs often lay in the bottom on wrappers, so they might open it up and lick every last crumb. 

While they are finishing the crumbs, they will dump them all over your couch. After every last morsel of food is consumed, they will go about their business of climbing on top of chairs and tossing all their toys around. Once they get bored with playing they will remember that delicious treat. They will bring you the empty wrapper and fuss some more. 

And chances are, if you deny them another treat, they will remember their "superpower" and, ultimately, receive another treat (unless you're out. In which case you have to turn on Baby Einstein to get their mind off of what they want.)