Those attending Junior Ranger Day activities at Lake Mead National Recreation Day on Saturday, April 27, will be able to participate in a variety of hands-on activities such as viewing springsnails and aquatic insects under a microscope as Izabella and Josiah Jennings of Kansas City, Missouri, did at last year’s event. Activities are scheduled from 10 a.m. to 2 p.m. at the Alan Bible Visitor Center, 10 Lakeshore Road.