On Saturday, teams participating in the Annapolis Yacht Club's 11th annual Build-A-Boat Challenge gathered to build Sika boats. According to the club's Web site, the groups had six hours in which to create a craft from supplied materials. The climax of the event was to have been Sunday, when the teams would take their creations out on the water for a race. Rain interrupted those plans, however. The event has been rescheduled for 6:16 p.m. Friday.