Activities in this weekly after school science program designed for students in grades 1 to 3 range from investigating snow and ice outside to exploring engineering and kitchen chemistry inside. Create, design, build, experiment, and have fun with science! Snacks are provided. Tuesdays, 3:15-5 p.m., Jan. 8-March 11 (no class Feb. 19). Members $200, non-members $225.

The Montshire Preschool is a fabulous opportunity to encourage the curiosity of children ages 4 through Kindergarten. It features age-appropriate activities and experiments in the physical and natural sciences. Morning (9:30-11:30 a.m.) and afternoon (1-3 p.m.) sessions offered on Wednesdays. Winter Session: Jan. 9-March 12 (no class Feb 20); Spring Session: March 19-May 21 (no class April 16). Either session: Members $190, non-members $210. Register for both sessions and save: Members $360, non-members $400.

Experiment with a very attractive topic in this three-part series: magnets and electromagnets! Also explore the basics of electricity as we build basic circuits with motors, bulbs, and batteries. Thursdays, Jan. 17, 24, and 31. Ages 6-8: 10:30-11:45 a.m. or 2:30-3:45 p.m. Ages 9-12: 1-2:15 p.m. Members $40, non-members $45.