Are thinking and solving puzzles a form of play? Fifth grade teacher John Murphy is convinced they can be, and he loves to offer “brain start-ups” to his students, the equivalent of engaging them in a game of Frisbee or freeze-tag, only mentally. The “start-ups” aren’t part of their math lesson, they’re just fun, but they can infuse fractions and decimals with delight. Recently he asked, “Which is greater, the number of people on earth now or seconds since the Declaration of Independence was...

“The sun was out and a rabbit was under the sun and an acorn was under the rabbit—a Christmas acorn.” So begins the exciting first page of preschooler Finley’s first book, A Hundred Acorns. As the book continues, the story’s protagonists, the acorns, face dangers: a ghost, a storm in a rain forest, and falling boulders. The plot finally resolves as the acorns escape and glimpse the magical presence of a sloth. Finley was extremely proud of his eight-page literary accomplishment. This is a...

What did my child do? If your child’s personality seems to change at this time of year, try not to worry. In spring a child’s fancy turns to pushing limits and boundaries. The same process that incites spring flowers into what Rilke called “blooming most recklessly” propels children’s instincts for expansion. In the past people called these surges of energy “spring fever.” Wasn’t it nice when there was a name for it? Mark Twain once wrote about the condition. “It’s spring fever and when...