Westport Country Playhouse will launch a Masterclass Series, a new children’s education program for middle schoolers, grades 6-8, on Sunday, February 8, from 12 to 2 p.m., in the Lucille Lortel White Barn, next to the Playhouse. The first class in the series will be led by Broadway talent and Westport native Adam Riegler (“Shrek,” “The Addams Family Musical”) on the subject of theatre acting.