Cast 2d6 with plaster of Paris and a little powdered tempera paint. Or skip the pigment and just make old-school white dice.
Take them out to the sidewalk, draw your hopscotch court, and start playing!
Just print and start casting. This is a six-piece mold.
Casting is easy, but there are a few little things to know if you've never done it before. I put a few tips at http://bit.ly/QSBEEV for my most recent mold, Seej Sidewalk Chalk.
Extra petroleum jelly on the top edges of the mold will act like glue to keep the mold together while the plaster is curing. Hold the assembled mold by the bracket-shaped side pieces (the six and one forms) when wrapping rubber bands, or you'll accidentally push the other side pieces inwards.
Little divots on the top surface of the three form tell you where to attach the other forms so that each pair of sides adds up to seven.