The Hershey Campus of Lancaster Mennonite School (PreK-8) will hold a summer open house July 25 from 4-7:30 p.m. that includes an ice cream social. The Hershey Campus features small class sizes from kindergarten through high school under one roof at 1525 Sand Hill Road, Hummelstown. See www.lancastermennonite.org/hershey for more information.