Get one ice cream bucket, 5 foam drinking cups & a sharpie marker.  Take one foam cup and tape (or glue) it on the top.  (This is the head.)  Then take two more cups and tape (or glue) them on the sides.  (These are the arms.)  Take the last two cups and tape (or glue) them on the bottom.  (These are the legs.)  Take the sharpie marker and draw eyes, nose (if you want to), and mouth.

If mom ever figures out how to post photos, she'll post a picture of this robot.