There is a token charge to enter the Wayang Museum, discounted even further for children. As the impressive collection is poorly signed, poorly lit, and generally confusing, it’s worth visiting with a guide. If arranging a guide at the entrance, agree on a price before you tour the museum.
Thanks to its central location in the heart of Old Town (Kota Tua) and its historic building, the Wayang Museum is an occasional stop on Jakarta Old Town tours, though you can also request a visit when exploring the city with a private driver/guide.