Extract the disc to make the checkers pieces and extract the dome to make the platform for kings.
You can use a utility cup to make a holder for the checkers pieces:
Here is a pdf file you can use to print out colored discs for your checkers pieces:
This pdf file has chess piece images for making a chess set:
Print the pdf document out at ACTUAL RESOLUTION, in a 1-to-1 ratio, from your printer. You'll need to look in the pdf print menu to delete the scale-to-fit feature.
Or, distinguish your pieces from your opponent's the lazy way. Just mark your pieces with a permanent marker. Flip a piece upside-down when you want to promote it to a king.
You can purchase a large chessboard online here from The Chess Store. Get the 2.375-inch-squares board to fit the checkers pieces.
These checkers pieces also make a nifty tic-tac-toe set. Just print out a decorated, colorful grid on printer paper.