I forget sometimes that the twins are tall enough to grab things from the kitchen counters. While I was making Emma and Elizabeth's lunches for school, I could have sworn I cut up an apple to put in. But it was no where to be seen. The twins were also no where to be seen, and they had been in the kitchen just a few seconds ago. Using my deductive reasoning, I figured the two circumstances must be related.
I found them (and what was left of the apple) here: