Make Robots out of Toilet Paper Tubes

What do you do with your leftover toilet paper tubes?  Recycle?  How about re-purpose?  I got this idea from Disney Family Fun magazine; now there robots were more advanced than my kids' robots, but you get the idea.

The kids painted the toilet paper tubes with Do-A-Dot markers.  My son painted his robot's eyes with liquid paper "Wite-out"(the one on the left).  My daughter had me draw a face for her robot (the one on the right). We taped antennas on the robots and curled pipe-cleaners around a pencil to get those crazy arms.  My son decided on his own to grab a paper towel tube out of the recycling bin to make an extension for his robot.  Kids, you have to love watching their brain work.

Anyway, now my son saves leftover toilet paper and paper towel tubes.  He has fun decorating them with his sister, and I love watching them be creative.