Each Blind Pack there are 2 coins. Either two hexagonal, two round or just one of them. The coins are round character enhancements for playsets or Toybox, during unlock the square new items or design elements exclusively in the Toybox.
The first of 3 sets consists of 20 coins. Four coins for Infinity characters and 16 coins for Toybox, including three very rare. Two other sets go later in the sale.
So you can give, for example, his character more damage, he quickly to level up. The Toybox itself can be designed from scratch (eg. In a Finding Nemo underwater world or in the animated classic Alice in Wonderland). And last you can unlock as Mickey car or Cinderella's Coach as a vehicle. All very nice, except for the character but rather improvements gimmicks in my eyes.
:: Conclusion ::
The Power Discs are a nice addition, but you do at least initially does not really need. One can Disney Infinity and all the playsets without play through and through hundreds of design elements in the Toybox remains without Nemos Underwater optics have much time to play. Something bad I can only find that the probabilities are nowhere mentioned often at all the various coins are spread and how rare the three rare coins really are.
Ultimately it depends on your wallet and the will to gather to whether one makes the power discs or not. I now have 7 coins at home and only a double (certainly lucky), but I have used up the only character coin no other. Four stars for the nice gimmicks to unlock a star deduction for the system of blind packs. The price is absolutely ok, trading cards were in my childhood also not favorable.