As you may already be aware, Wooly Willy features a piece of printed cardboard with vacuum-sealed plastic attached to it. Inside the sealed plastic's bubble are thousands of metal shavings. The toy's user employs the attached stylus with magnet inside to move and manipulate the metal shavings and "draw" items onto Wooly Willy's printed face.
I just said a mouthful! (Well, I wrote a mouthful -- or something. You see my meaning! Maybe.)
In short, you can change Willy's face with a magnet.
Do you think Wooly Willy is right for your little one, your school, or even you? I think it provides constructive fun for all ages (but then, I'm a comedian, not a kid expert -- a "kidspert"?).
If you decide Wooly Willy is for your child (or you -- I won't tell!), you can pick him up through this page. Helping you shop right through this page is very thoughtful of me, I know! ;-)