For your reference as you register, here is the list of full classes (updated 6/3/13):

Cancelled class(es):
S39 Fantastic Fairy Tales

Full Classes:
S35 Up, Up and Away
S36 Lego Building Workshop
S38 3-6 Sign Language
S63 A Visit to Mexico
S71MR  1-2 Math and Reading Challenge
S78 Innovation and invention
S88 3-6 Who Wants to be a Superhero?
S93 1-2 Trails & Creeks
S94 1-2 Chess
S96 3-6 Chess
S01EW Behind the Scenes Exploration Week (K-2)
S02EW Behind the Scenes Exploration Week (3-6)

Classes with five or fewer spots left:
S33 Recycled Art
S34 1-2 Painter’s Studio
S36B Lego Building Workshop (session II)
S41 Healthy Me!
S42 Cooking Up a Story
S44 Clay Creations
S45 Magical Potions
S46 Super Spies
S48 Willowwind Kids Detective Agency
S51EW K-2 I Like to Move It Move It Exploration Week
S52EW 3-6 I Like to Move It Move It Exploration Week
S64 World Music
S66 Crochet Creations
S68 Clay Creations
S72MR 3-6 Math and Reading Challenge
S73 Fiber Arts
S75 Creative Drama-Storytellers
S76 Build a Rocket to the Moon
S77 Fiber Arts
S85 1-2 Tae Kwan Do
S86 Creative Cooking 1-2
S92 Spanish
S93 1-2 Trails and Creeks
S94 1-2 Chess
S97 3-6 Tae Kwan Do
S98 3-6 Trails and Creeks