Blinkers and Buzzers (Boston Children's Museum Activity Book)
Description
Traffic lights, telegraphs, and burglar alarms are just a few of the exciting battery-powered models that can be built from this involving book. Fifty creative experiments show how and why these devices work while providing hours of hands-on learning fun. A Boston Children's Museum Activity Book. - from Amzon
ISBN(s)
0688099653, 9780688099657
