The medieval era has always captured children's imaginations with its rich pageantry, inflatable castles, and the innovation of the "fun pass." Open the Middle Ages to all ages with today's Groupon: for $18, you get six open-play passes to Daly City Party Playhouse in Daly City (a $36 value). Open-play dates run Tuesday–Thursday from 10 a.m. to 6 p.m., and Fridays from 10 a.m. to 3 p.m.
Daly City Party Playhouse immerses families in more than 50 medieval-themed but modernly supervised climbing structures, rides, and games. Open-play passes grant visitors unlimited access to the castle playhouse and its surrounding countryside of ball pits, slides, and mazes overseen by an attentive staff and domesticated minotaur. Just beyond the bounce houses and climbing tunnels lies an arcade replete with rides and games such as air hockey and basketball toss. A toddler area partitions wobbly walkers from the older cavorters, and the adult lounge appeases larger folk with HD television, Internet access, billiards, foosball, and lectures on medieval innovations in wheat-milling technology.