At Toys "R" Us, buy one Disney Infinity Power Disc Series 3 for $4.99 and get a Power Disc Series 1 or Power Disc Series 2 for free. (Discount shows in-cart.) The Series 3 qualifies for free shipping; choose in-store pickup for the Series 1 or 2 pack to avoid the $4 shipping fee. Either combo is at the lowest price we could find by at least $5.