Have you been outside or went camping for hours and your phone dies and their isn’t an outlet in a ten mile radius and you are really bored. It is like 100 degrees outside well I just solved your problem with your new home made solar charge.

It is easy simple and for first time engineering it has to due with engineering because you need to have  skill to build it and if you really love your phone well with this you can still send Snaps or Candy Crush with this new phone charger.

It relates to engineering because you have to use different parts to assemble it, as well as making sure you do that correctly.

http://www.instructables.com/id/How-20-Make-a-Solar-Cell-Phone-Charger/