The Roger Tory Peterson Estuary Center (RTPEC) hosts an Open House this Wednesday from 6 to 8 p.m. Participate in a scopes and slime activity, learn about the Connecticut River Estuary, create your own creatures and stump the naturalist.

This informative and fun night offers free entry and is open to all.

The RTPEC is located at 90 Halls Rd. next to Big Y in the Old Lyme Marketplace.