Add floating fun to shape recognition! Our watertight bubbles help kids master 10 different shapes—from circles, squares and rectangles to triangles, ovals and more. Each bubble features a shape on one side and a matching real-world example of the shape on the other—so kids get tons of reinforcement identifying shapes and developing vocabulary while they enjoy water play. Set of 20 see-inside plastic bubbles; each measures 2 1/4" in diameter.