What do blades, brooms, and sturdy ankles have in common? A babushka, yes, but also Castle Ice : an arena for hockey, figure skating, and broomball enthusiasts. Castle Ice has one small rink in the corner for young beginners, as well as a full-size one for ice kings and queens who want to strut (or glide) their stuff at the center of the arena. Ice skating, an activity that can be traced back to the frozen lakes of Finland, where animal bones were used as blades to travel long distances, has taken a more pleasurable turn in the past few centuries, particularly at Castle Ice, which offers plenty of rooms for birthday parties and skating classes for both kids and adults. Kristy Hamilton 12620 164th Ave. S.E., Renton, 425-254-8750, castleice.com