To the Victor Goes the Snacks!

I have two girls, both adorable, and both 100% opposites.  Peniel is a huger, Rafe is a biter.  Peniel likes to be the boss, Rafe refuses to take orders.  Peniel is easily distracted, Rafe is not.  Peniel will befriend anyone free of charge, Rafe cannot be bought.  Peniel enjoys cartoons, Rafe enjoys stealing Peniel's snacks while pretending to watch cartoons...this list of differences goes on, but its the last example I want to expound upon.
Every day, after naps, the girls get a snack and a sippy cup.  Their snacks are identical, each has the same amount of crackers and same ounces of water.  One of my girls never questions the fairness of snack time...but the other...the middle child...the one who bites...eye balls both snacks to verify equal amounts.  Even still, she must have both snacks and both sippies otherwise, its unfair!  I am convinced that instead of sleeping during her nap time, she is strategizing with charts and graphs and running undercover-op drills in her room in preparation for:  THE SNACK TIME HEIST. 
Peniel loves her cartoons, she takes them very seriously, not one second is to be missed, even if an exploding bladder is a consequence.  Rafe understands this about her older sister, and every day exploits this characteristic.  Every day, I wonder how the snack time heist is going to go down because it changes...Rafe is smart and knows you cant trap a wolf the same way twice so she evolves her strategies daily.  Her most frequented approach goes something like this:  as soon as the cartoon theme music begins to play, she starts to dance and laugh, baiting her sister to join her...Peniel in unable to resist any moment that calls for dancing, so she joins in.  Before the theme music stops Rafe is MIA. As the cartoon begins, Peniel sits down forgetting that she left her snack and sippy on the table...Unfortunately for her, Rafe did not forget about the abandoned snacks and proceeds very quickly and quietly to collect them and eats them as fast as she can chew, sometimes choking herself in the process as she shovels fistful after fistful into her pie hole...she always leaves at least one cracker and some floaties in an almost drained sippy...this is her calling card.  If not for me, the mother, Peniel would never have a snack or anything to drink.  I now have to fill two snack cups and two sippies half full in anticipation of my sneaky bandit Rafe...when she is satisfied that she has won her battle against her cartoon mesmerized prey, she walks off, belly full and plays with her toys.  This is the time that I pull out Peniel's real snack and force her to eat and drink before Rafe gets wind of my under handing, counteracting, null and voiding her klepto ways. I love them both...that is why I let Rafe steal her sisters "decoy" snack, and why I keep a "real" snack for Peniel.