Director Tom McGrath says that this film is a tribute and apology to his older brother, because like all younger siblings, he was for a time the “boss baby.” He gives the story a pleasantly retro look, setting, and soundtrack, evocative of old-school cartoons and an era before everyone was mesmerized by devices. It is surprisingly funny and even more surprisingly sweet. Tim is a great kid, brave, smart, and wonderfully imaginative, and it is nice to see a movie for children that is about something other than following your dreams or learning to be confident. It’s about visceral feelings everyone will recognize — worrying that there is not enough love to go around, jealousy, competitiveness. And it is also about feelings we should recognize but too often overlook: the importance of imagination and the pleasures of being a kid.