Toys from Trash. Recommended by Andrea Beaty, author of Rosie Revere Engineer and ONE GIRL [Abrams
Rollbahn ("roller-run") color and movement toy, designed by Mike Ayres and Roger Limbrick, Switzerland, 1984, by Naef Spiele. The colored discs, with various designs and patterns, take almost a minute and a half to completely descend the zig-zag pattern of the frame, slowly mesmerizing with alternating shapes and visual trickery.
A lemon battery experiment involves the useof a juicy lemon, copper coin and zinc nail to form a lemon battery. When four such lemon batteries are combined, they produce enough voltage to light up an LED (light emitting diode).
Learn how to make a breathing machine from the author of Maker Lab, Jack Challoner. This easy experiment uses household items to construct model lungs and show how some vital parts of the body work. -- Learn about the respiratory track hands on, at home!