Make a tic-tac-toe board (or as Junie B. refers to it, "tic-tac-toad") by drawing two vertical lines on a piece of paper with black marker and two horizontal lines bisecting the vertical lines so you have a small checkerboard with one enclosed box in the middle and all of the others open. If you want, you may draw a square around the whole thing to close off all the boxes. This is your game board.
Use two different-colored markers, crayons or pens for the two players. To win the game, you will want to get three of one symbol in a row. To make a long-lasting board, use a laminated piece of paper or cardboard and draw the tic-tac-toe board with permanent marker. Then use two different-colored dry erase markers for the two players. Or use different-colored checker pieces or other game pieces in place of X and O.
Choose a box from one of the nine squares and draw your chosen symbol there, X for example. The other player, O, will choose a box and place his symbol there. He might try to thwart X from placing two in a row by drawing his O in a box next to X. The players continue to take turns and place symbols until the board is full or one player has managed to get three in a row. If the two players successfully thwarted each other and there are no three in a row, the game is considered to be a draw.
Play by the rules. When Junie B. played with her grandpa, her grandfather let her get away with winning by making a curvy line to connect her Xs even if they weren't in a straight row. Then when Junie played with her best friend Grace, Junie yelled, "Tic-tac-toad, three in a road!" and Grace got mad at Junie B. for cheating because her Xs weren't in a straight row. She even showed everyone on the bus the tic-tac-toad board to embarrass Junie.