Christian Moore looked at the upturned faces of the children before him. Some of them stared back, blinking, others frowned. No one said anything.

“Anyone?” Moore waited for a response. When none was forthcoming, he continued. “Doyouthinkhesaurus.” He smiled at his own joke, which he knew was pretty poor, but he thought he may have gotten at least some form of reaction from a group of ten year olds. However, the c...