Currently under construction, Polyominos, Polygons, and Polyhedra is a geometry online opensource textbook for students not majoring in mathematics, including Elementary Education majors. The textbook encourages learning through activities, both hands-on and virtual. Mathematics instructors who are interested in using these materials are encouraged to contact the author at tmagnus@rivier.edu. Feedback and notification of errors is greatly appreciated. Geogebra and Polypad interactives cannot be used for commercial use.