The idea of guiding a large group of children can send some adults into a cold-sweat panic. What they may have envisioned as an idyllic reading of “If You Give a Mouse a Cookie” or a thoughtful conversation about the life cycle of the butterfly begins to look more like a full-scale mutiny as serene children on the rug bounce around like popcorn kernels and contribute thoughts to the group discussion that range from what they did on Wednesday (“or maybe that one other day that wasn’t yesterday but wasn’t a long, long time ago…..”), to the dead frog discovered in their driveway, and on to an impromptu performance of a funny commercial they saw this morning.