Hello readers my name Jessica Teruel.The reasons that i wrote this book for ages 12-13 is because one day i was sitting in my science class and my teacher told me i had to do a book project talking about electromagnetic waves.At first i gave it no intrest at all and i didnt want to do it ..but then i thought it might be cool to shoe kids youger than me what i know and teach them. If i learned alot of things by doing the project than u can too.