It all started 56 years ago with a brown paper sack. This no-frills carrier contained a stash of glue, crayons, scissors, and strips of construction paper. These were my teaching tools. According to my mother, I carried this sack with me everywhere. Naturally drawn to showing and explaining things, I later graduated to using a small chalkboard. When our cat had kittens, they became my pupils, though admittedly they were less attentive than my stuffed animals.