Look around you. What do you see? A yard? A chair? Pencils? Your hand? Everything you see or feel or imagine in your space right now is a wonderful subject to draw.
This activity is quite simple and fun for all ages. All you need is a drawing hand, a utensil to draw with (pencil, marker, pastel, charcoal), and paper.
Put yourself in a comfortable location. For me, my desk is my favorite place to draw or out in my yard. If you are in your yard, make sure you have a hard surface behind your paper.