Photographs by Map: Mikle15, Dreamstime; Crocodile: Wrangel, Dreamstime; White European rabbit: Mikelane45, Dreamstime; Bulldog: Sunheyy, Dreamstime; Fox: AtWaG, iStockphoto; Brown Horse: Jozsef Szasz-fabian, Dreamstime; Robot pet: julo, iStockphoto; Chocolate chip cookies: kemalbas, iStockphoto; Paintbrushes: harmpeti, iStockphoto; Bike: Fadyukhin, iStockphoto; Book stack: Vivilweb, Dreamstime; Hiking boots: amriphoto, iStockphoto; Gadgets: ymgerman, iStockphoto; Brain: AnthiaCumming, iStockphoto; Paint palette: ChrisAt, iStockphoto; Math: gpointstudio, iStockphoto; Open book: Ingrid Prats, Dreamstime; Sports equipment: Michael Flippo, Dreamstime; Beaker: agencyby, iStockphoto; Beach hut: malamus-UK, iStockphoto; Chambord Castle: Stevanzz, Dreamstime; Factory Loft: Skorpionik00, Dreamstime; Victorian Mansion: Paul Hakimata, Dreamstime; Log Cabin: Michal Durinik, Dreamstime; Glass Structure: anandoart, iStockphoto; Dino fossils: mjbs, iStockphoto; Artist: NoDerog, iStockphoto; Cool kids room: ondatra-m, iStockphoto; Concert tickets: Pixelrobot, Dreamstime; Horseback rider: ROMAOSLO, iStockphoto; Kid inventor: tvphoto, iStockphoto; Kid walking: Sybe Bakker, Dreamstime; Horse and carriage: Hardwarehk, iStockphoto; Steam engine: elmvilla, iStockphoto; Ocean liner: Andreasg, Dreamstime; Covered wagon: milehightraveler, iStockphoto; Spaceship: adventtr, iStockphoto; Prehistoric scene: William Roberts, Dreamstime; Renaissance fresco: Scaliger, Dreamstime; Industrial age: eucyln, iStockphoto; Queen Victoria: duncan1890, iStockphoto; Gold rush: JohnnyGreig, iStockphoto; Futuristic city: BertrandB, iStockphoto