Titus Moreau, of Chase Mills, shows how his homemade water turbine works at the Nicandri Nature Center Monday, April 21, with help from staff member Blair Cryderman. A free spring vacation camp is available any or all days this week, and no preregistration is required. A camp for children ages 5-9 runs from 10 a.m. til noon. A camp for ages 10-13 runs 1-4 p.m. NCNow photo