The Missing Piece

If you have children or grandchildren you may have a puzzle with a missing piece or two.  This happened with my grandson's spongebob puzzle.  So we took a piece of stryofoam plate, laid it under the spot where the missing piece went.  Then traced, my artistic son drew the puzzle piece onto stryo piece, my grandson and I colored it in with matching markers and then we cut it out.,  Tada... can you see it?  It's the shoe on right side of puzzle.  Pretty tough to spot, huh?