As part of Summer Reading 2025, Harford County Public Library hosts The Science Guys of Baltimore: Color Our World on July 3 from 10:30 to 11:30 a.m. at the Edgewood Library, 629 Edgewood Road, and from 2 to 3 p.m. at the Abingdon Library, 2510 Tollgate Road. The program takes children on an exciting journey into the science of colors and how we see them. Through fun experiments and interactive demonstrations, young scientists will learn about light sources, prisms and the science of rainbows. Participants will navigate the world of color with The Science Guys through laser shows, rainbow reveals, optical illusions and much more. For more information, visit HCPLonline.org.