You will probably end up making more than one...good thing materials are relatively cheap.
Once again, dig through the paper recycling bin to find an expended toilet paper tube, some scrap cardboard and a manila file-folder, You will also need a small compression spring and a short piece of wire with black insulation. The springs extracted from a ball point pen seem a little too small (my spring is 7/16" x 2-1/8"). Craft glue, some tape and a pair of scissors to put it together,
Print out the large image of the robot which can be found here
. Print it out as is. Don't force it to fit-to-page, you should get the right size to use which is about the height of your paper tube.
If you are lucky enough to have a color laser printer, the better it will look but an ink-jet printer on glossy stock will work just as well.
FAINT-OF-HEART warning here...
Proceed to cut out and detach the robot head from the rest of the robot picture. Leakage of oil is expected. Glue this top part to a piece of stiff cardboard. Set aside to dry.
Laminate or glue the rest of the robot to a piece of the manila file-folder or thin cardboard stock. Set aside to dry.