These were very popular gifts last year! Right now you can get an additional $5 off when you buy any two! See them from Amazon here! Shipping will be free because your total will be over $25 before the discount.
For example buy 2 Perplexus Rookies for $15.44 (33% off) and your total should be around $25.88 shipped (just $12.94 each, reg $22.99 each).