Pintrest couldn't find the picture on the page but this is a 500 in 1 electronics kit you can use to learn to build circuits and about the inside of electronics. No soldering is required and no tools required. Sounds like fun!
An electronics lab that fits in an Altoid tin. And, while you're at it, dart guns, pinhole cameras, flame throwers, and Morse code oscillators, also from Altoids tins. (You may wish to refrain from demonstrating to your homeschool kids the use of the Altoids portable martini bar.) From the Art of Manliness blog.
"Crystal Radio: A Science Kit for Student Electronics": Build a crystal radio and then tune in an AM radio station--without batteries. An improved crystal radio kit and an updated procedure makes this a great choice for an assigned #science project or just for hands-on #electronics fun! [Source: Science Buddies, http://www.sciencebuddies.org/blog/2014/03/crystal-radio-a-science-kit-for-student-electronics.php?from=Pinterest] #STEM #scienceproject #crystalradio