Communication Systems can be Wired or Wireless and the medium used for communication can be Guided or Unguided. In Wired Communication, the medium is a physical path like Co-axial Cables, Twisted Pair Cables and Optical Fiber Links etc. which guides the signal to propagate from one point to other.
Jessica Ivie is raising funds for The Jesseybug Electronics & Arduino Inventors' Kits on Kickstarter! Kits for learning electronics through hands-on activities including making a space invaders game. Basic, Arduino and robotics kits.