Round plastic drinking cup with lid, or round food storage container with lid
Pebbles or sand
Drinking straw (a straight one, no bendies!)
Poster board or card stock paper
Black permanent marker
What You Do:
Start by putting the lid on the plastic container, and turn the container upside down. Trace around the lid, and then make another circle around the outer edge, at least 2 inches wider than the first one.
Use a ruler to divide the lid in half along its diameter, and then divide each of those halves in half. Have your child write the words for the four parts of the compass along the outer edge of each of the four sides. Moving from the top, clockwise, she should write “North, East, South, and West.”
Now open the container. Stick a blob of modeling clay or putty on the bottom of the container, and then fill the remainder to the top with pebbles or sand. Snap the container lid on and tape it, if necessary, to keep it secure.
Glue the container, upside down, onto the cardboard compass base you just made.
Take the sharpened pencil, and poke it through the center of the plastic container so that the eraser is on top, and the point is held by the putty and sand.
Now, cut a broad triangle and a square, both about 3 inches across from your construction paper. Cut a slit in each end of the straw. Slide the triangle onto one end and the square onto the other. Use a bit of glue if they seem to slip. Push the pin through the center of the straw and attach it to the top of the pencil eraser. If you flick the straw, or blow on either end, it should move freely.
Take your wind vane outside to a place where the wind is not highly obstructed. Help your child find north, south, east, and west on a real compass, and line up the wind vane accordingly. Wait for the next breeze; the arrow will point to where it’s coming from.