Belinda the Bullfrog needs our help! She has misplaced her eggs in the Arboretum, but you can help her find them and learn all about frogs. Four hour-long sessions are offered between 10 a.m. and 2:30 p.m. Activities and a craft follow the egg hunt; bring a basket or bag for collecting. A special area is reserved for egg hunters ages 18 months to 4 years. The hunt is sponsored by the North Suburban Youth Foundation. Preregistration is required; the cost per person is $4.50.