Crown Point’s next Ecology Discovery Program, Bats in Your Belfry: Construct a Bat House, is March 24 at 10 a.m. at Crown Point Ecology Center, 3220 Ira Road. Part of the monthly Ecology Discovery Program, which runs through June, participants will be lead step-by-step in constructing a bat house. Cost is $8 for adults; $6 for Crown Point members; and $2 for grade school aged children. There is an additional $30 material fee per bat house. Participants should bring a hammer.