Microsoft Store offers the Disney INFINITY Power Disc Pack: Series 1 for $1.99 with free shipping. That's the lowest total price we could find by $3. Each includes two discs. Power Discs give you added abilities and items to use while playing in a playset or in the Toy Box game modes.
Of note, you'll need the Disney INFINITY Starter Pack to use these discs.
Celebrate your big day with free meals -- or desserts -- at more than two dozen restaurants.