Austin Children's Museum camps for ages 4-10 (scholarship forms due March 27)
Dougherty Arts School camps for ages 3 1/2 - 13 (scholarship forms due April 10)
Austin Nature and Science center camps for ages 3-14
YMCA Day Camp for ages 4-14 at various locations throughout Austin or check out their Spring Youth Sports programs
Also, in April, look for registration information on swimming lessons from the City of Austin Parks and Recreation Department. Lessons start in May.
Go here for a more comprehensive list of camps offered in Austin.