If you don't mind it being a small notepad, Universal Impression is great. Spectator draws something, rips the paper out, folds it, and then puts it in their pocket. The performer puts the notebook away and then pulls out a piece of paper like a business card or post it note. The performer reads the spectator's mind and draws what he or she thinks the spectator's drawing was. The performer turns over the paper and puts it on the table. The spectator takes out the folded paper they drew on and unfolds it. The spectator then turns over the drawing the performer drew. Both drawings are the same. GREAT effect.
-Doug