Practice With Geometrical Figures
First secure some geometrical figures. Take for example a five-pointed star, have the child look at it carefully, then close his eyes and reproduce its form and size in a clear, visual picture. Let him look at the drawing and see if he can improve the clearness and definite proportion of his mind's eye picture. Now have him take a sheet of paper and draw this picture as he sees it in his mind, and when complete compare it with the original for accuracy in size and proportion. Let him close his eyes several times and get just as definite a mind's eye picture as possible before he attempts the drawing of the figure. Practice with figures of this kind, gradually increasing their complexity.