Crystal Cruises is expanding its Kids Sail Free program from four voygaes to 21.  With the promotion, kids aged 17 and under can sail free when sharing a stateroom with two adults. Now included in the program are seven- to 15-day voyages in the Mediterranean, Western Europe, North Cape, Baltic, British Isles, Canary Islands, and across the Atlantic from May to December aboard Crystal Serenity and Crystal Symphony.  For this growing population of “junior cruisers,” Crystal will add Magic Castle at Sea shows and classes during summer cruises.  Every Crystal cruise also offers family-friendly learning and entertainment, including iPad Digital Filmmaking classes (in association with USC’s School of Cinematic Arts) and dedicated on-board kids and teens spaces.