Make up several of these quick Blockhead people and leave them blank. When the kids come over let then color the faces with magic markers. For younger children I recommend non-permanent magic markers or paint pens. The block is 2.5" X 3.5" X 1". I included patterns for the feet and arms. I didn't use the arms on Frank. I used axle pegs for Frank's bolts.
If you want to duplicate Frank I show all three views in the pattern so you can copy the drawing.
DVD and the 2013 update DVD at this link. DVD #1 is $20 and contains over 1,100 patterns. The 2013 update DVD is $7.50 and has another 178 patterns.