Batman Little Mates 4 In 1 Double Stamper Bubble Pen. Includes a pen, bubbles, stamper and a roller stamper all in one. 2014. $3.95 | Superman Little Mates 4 In 1 Double Stamper Bubble Pen. Includes a pen, bubbles, stamper and a roller stamper all in one. 2014. $3.95 |