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First Science Experiments: Mighty Machines (First Science Experiments)
First Science Experiments Mighty Machines - First Science Experiments Author:Shar Levine, Leslie Johnstone How do machines work? Kids will have a blast constructing a mini-seesaw to illustrate the way a lever operates or creating their very own pulley from an empty spool, string, ribbon, pails, pennies, a broom, and two chairs. They’ll find out why they can’t put in a screw using only their fingers and examine the different parts of compo... more »und machines. In another experiment, a child’s bicycle becomes a laboratory for understanding whether wheels have to be smooth to run. A good time will be had by all.« less