Elenco LED Robot Blinker Soldering Kit with Iron and Solder Hone your DIY soldering techniques on the LED Robot Blinker Enjoy the pleasure of having assembled and soldered it yourself Have fun building, displaying and learning about the LED Robot Blinker Learn about free running oscillators Includes: PCB, electronic components, instructions and 25 watt soldering iron, stand and lead free, rosin core solder PCB measures 108mmX889mmX16mm Add this kit to your STEM curriculum From the company that brings you Snap Circuits - 9 volt battery not included