Just a couple of days ago, my husband and I heard our 5 year old daughter ask her big brother for help with something upstairs. I believe she needed help opening a plastic storage bin of toys. I stopped paying attention after a few seconds.
Then I heard our daughter yelling in a very commanding tone . . .
"Open says ME! Open SAYS ME!!!"
After a minute of being quite confused and curious, I figured out that our 8 year old son must have told her to say "open sesame" before he would open the toy bin for her. This was not quite as silly as the Mrs. Hippy story, but it did make my husband and I chuckle.