With design-savvy, yet completely kid-friendly illustrations, they’re asked to draw or write about a bunch of interesting things — like what their hair looks like, what their band name would be, what they’d bring to outer space, and how they feel about lightning, lizards and pickles. There may or may not be a place for super-secret stuff inside the book jacket. Whether kids complete their entire compendium on a rainy day, or finish it over a year, it’ll become a treasure to look back on and smile.