Four square is a great game to play outdoors! You will need a playground ball and some chalk. First thing is to draw four even squares to make it look like a window. Then label them 1, 2, 3 and 4. You will need four players, one in each square. The four square is the highest position and always gets to serve. The person if four bounces the ball and then hits it into another square. If it bounces successfully into another square then the person in that square must hit it into another square. When someone hits it outside the square its "out of bounds" and that person is out of this game. They either go to square one if there's only four players or they are out and go to the end of the line. Everyone else moves up a square and a new player comes into square one. It's one of my favorite outdoor games.
There are a number of ways to set up a hopscotch game outdoors. Find a level surface and draw the diagram shown on the page. Each box can be as big or small as you'd like depending on your skill level. Draw another line a few feet from the bottom of the diagram. Number each box as shown. You will need a smooth rock that can be thrown onto the squares. To start the game, stand behind the line and throw the stone onto square 1. Hop over the stone onto square 2 and continue to hop to square 3. Jump with both feet onto squares 4 and 5, hop onto square 6 and jump with both feet onto squares 7 and 8. To come back the other way, jump and turn at the same time and retrace your steps. When you reach square 2, stand on one foot and bend down to pick up the stone. Return to the line. Continue the game by throwing your stone onto square 2 and repeating the hopping, jumping, and turning. You lose your turn when you miss the square with your stone or when you step on or over the line. Leave your stone in the square to be repeated if you're playing with friends. Try to complete the path through the hopscotch from square 1 to square 8 and back again.
There's a lot of variations to this outdoor game and most kids make up their own rules anyways. The basic idea is that there are 2 groups. One group of cops and one group of robbers. Some play this on foot, similar to tag and some play it on bikes so that you can actually pull someone over. In order to pull someone over the cop must catch up to them so that the bikes are even and the robber must pull over. Then they have to stay there until another robber comes and tags them free. It's an ongoing game until the kids feel like switching the cops and robbers.