Ipswich's Down Town Tuesdays get a Latin vibe tonight with River Walk Dancing from 6 to 9 p.m. at the River Walk Patio, on the corner of Union and Market streets in Ipswich. Get a free Latin dance iInstruction from 6 to 7 p.m., followed by dancing under the stars from 7 to 9 p.m.
The Swampscott Public Library, at 61 Burrill St., Swampscott, presents a Bedtime Math Pajama Party to make nightly math as common and beloved as the bedtime story. The program, which starts at 6:30 p.m., is suitable for children ages 3 to 6. Kids will enjoy math stories and activities, followed by milk and cookies. Attendees will leave with a goodie bag. For details, visit http://bedtimemath.org.