Headcanon that the batkids hide under Bruce’s cape ALL the time. When they get cold on patrol, when they’re scared of a particularly creepy villain, when they get tired and need a warm, dark place to hide, they can always be found in Bruce’s cape, hanging onto his back like a koala. One time Hal and Barry were at the watchtower just hanging out when they saw something move under Batman’s cape. Assuming it was an alien parasite out to kill the dark knight by sucking his brains out, Barry pulled off the cape to reveal not one, not two, but three of Bruce’s kids huddled under there playing a game of Uno. It was a mystifying experience.