Instructors from Einstein's workshop will help you and your young robotocist build and program a LEGO alligator. You will build with a motor and program it using tile-based click commands.

"A is for Atrium" is a series of Tuesday morning programs at Atrium School, 69 Grove St., Watertown, MA. Parking and the school entrance is at 35 Kondazian St. These free programs for young children and their parents or caregivers take place from 9:30-11:00am and include the featured program of the month, the "magical" Gym Bus, a song and story, art projects, and a nutritious nut-free snack.

RSVP appreciated, but not required to: Sandi Dunn, Director of Admissions, (sdunn@atrium.org or 617-923-4156, x125).