Fans of Nijntje, AKA Miffy, the little bunny created by artist Dick Bruna, may be interested to know that this week only, entrance to the Dick Bruna Huis in Utrecht is free. According to the Centraal Museum's Facebook page, there is one catch, though. You have to be sporting a mustache. However, if you're folliclely challenged in the upper lip area, it seems that mustaches, like art, are open to interpretation. Draw one on, print one out, or find some other way to get creative. Just put on your best mustache.

The museum is open Tuesday through Sunday, from 11:00-17:00, and is located at Nicolaaskerkhof 10, Utrecht.