There's no point hanging around indoors playing checkers on a nice summer day. Here's a version made for the great outdoors.
First make a playing "board." Use chalk on the sidewalk or driveway, scratch a board in the soil, or mark in the sand if at the beach. For dark-colored squares, use diagonal lines or cross-hatching, or wet the squares with water.
Collect jar and plastic container lids for use as checkers. For example, the red checkers might be yogurt container tops, while the black checkers consist of metal jar lids. Another approach is to have your child tape pieces of black or red construction paper onto the various jar lids to designate their colors.
Play according to the regular rules of checkers.