Talk about multi-purpose—this 4 Function Pen ($39) is also a pencil, highlighter and PDA stylus. The Christmas Light Bulb Pen ($2), on the other hand, is great for a kids who need to be coaxed into doing their work. The bulb lights up when it's pounded. Younger ones will like the rubbery (and ridiculously cute) Bending Animal Pens ($2). For a special splurge, try the Kaligraffiti Pen ($30). It has a cool design and a cooler spray-paint can holder.