It's very easy, but in case you need it, here's how to build the robot dog featured on Tranquility Base.
Take careful note of step 2 - you have a choice of using an old-style 'finger hinge' (used in the instructions) or the new-style 'click hinge'. The method for attaching the tail (control stick) is slightly different in each.
Obviously the colour scheme is entirely up to you. Go nuts!
Remember, if you take a picture of your robot dog doing something funny (or in an unusual place etc), let me know and I'll add it to theTranquility Base robot dog hall of fame!
Instructions are also freely available as a downloadable PDF file: Robot Dog Instructions