You bogarted your niece’s robot dinosaur for a solid three hours after her birthday party. Admit it. We won’t judge you. Today’s playthings are some tempting stuff. They’re bigger, stronger, and faster than the foot-powered plastic “cars,” immobile Lego fortresses, and dead-eyed Teddy Ruxpin dolls that came before. Building sets are so lifelike, go-karts so zippy, and robots so intelligent that even adults will find these outsize toys utterly irresistible. Now kindly hold my beer, kid; there’s a Nerf battle that needs my full attention.