Old Town hides more small museums than most itineraries allow for — tucked into towers, medieval buildings, and side streets most visitors walk straight past on their way to Town Hall Square. Here are five worth a detour, all an easy walk from anywhere inside the walls. Nuku Muuseum (Estonian Puppet Theatre Museum) Photo by James Lo on Unsplash On Nunne 4, a two-minute walk from the city wall, Nuku is the world's only museum dedicated entirely to puppet theatre. Adult tickets run €10, with interactive exhibits that work well for kids and curious adults alike. It's open Tuesday to Sunday, with…