One of our top selling books is now combined with various items to perform some of the more than one hundred experiments. Scientific principles are explored in a fun and practical way. All of the projects are safe and easy to perform at home. Make an alarm to keep intruders out by using the buzzer and wire included. Learn about air pressure with an experiment using straws and an empty thread spool included. Amaze your friends with a signal that you can change from "come in" green to "go away" red. Corks, red and green cellophane and light bulbs are included for this exciting experiment. Whatever you decide to do, you will enjoy following the simple step-by-step instructions and making your own scientific discoveries.
= Christian 
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