Pretend to live happily ever after in a land far, far away at "The Amazing Castle." Knights and fairies of all ages are invited to dress up in their favorite costumes and participate in special activities for the recently reopened interactive exhibit. Watch performances by medieval musicians and jugglers and enjoy a castle-themed story time. (9 a.m.-5 p.m. Sat. $9.50. Minnesota Children's Museum, 10 W. 7th St., St. Paul. 651-225-6000.