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For this project the rocker bogie was purchased from: https://www.robotshop.com/uk/bogie-runt-rover.html It also comes with six motors! A rocker bogie is great for going over rough terrain: it's the reason that space agencies use this design!  PS this is the most expensive component! After this, the components are cheaper; plus now you can add incrementally to your rover design. 

Before you assemble the rocker bogie, paint it to the colour of your choice. The best way to do this is to use spray paints - ask an adult to help you! PS dont do this on paper like on the picture as it may stick (we all make mistakes) - find a solid surface which you do not mind getting paint on. Also, if you paint the motors be careful not to get paint in the moving parts - spray the paint from a distance so you give them a fine coat.

Once you are happy with the colour, assemble the bogie using the supplied instructions. For this bogie see the 3rd party video below. At this point you should feel good that you nearly have a moving rover! Keep it up!!!

The next step will be to buy a microcontroller (MORE LATER), but if you are eager to see it move straight away, which I was, you can add a power source (a regular battery supply) to see it in action! A 6 Volt battery box can be purchased, here: https://tinyurl.com/yxydbleh. The wiring diagram is shown below.