OMG, this cracked me up.
My DD, who is almost 17, LOVES the stuff. She carries an "egg" of it with her everywhere. She especially must have it when her choir sings in church. It keeps her occupied during the sermon. (Don't tell me she should be listening. We have a problem with our pastor, but that is a whole other story. I digress.) A few weeks ago, she was in the choir loft and I was in the congregation in the balcony. We have a large sanctuary. Anyway, I hear this LOUD pop and look down and see her grinning at me. It was that sound you can make by cracking the Silly Putty. All the kids around her were trying to contain their laughter. I wondered how many people heard it or knew what it was.