Turn a spot in your yard into a giant version of the classic paper-and-pencil game tic-tac-toe. Stone pavers laid into the lawn in a checkered pattern create the playing board. Youngsters can help by turning smooth rocks into playing pieces with paint.
To make the board, arrange the pavers where you'd like them on the lawn. Then, using them as templates, cut through the sod with a trowel or shovel. Remove the pavers, dig up the sod, and replace the pavers.
For playing pieces, paint Xs and Os on 10 smooth, clean stones.