If you don’t want to purchase any of the LEGO Super Mario sets on [email protected] to get the free Super Mushroom Surprise Expansion Set (30385), I’ve been told that Target is also carrying it in stores. The price of the polybag is $4.99 and you can probably find it at the LEGO aisle or on the endcaps. Note that you’ll need the Starter Course (71360) to make use of the play functions of the set. Thanks to Charles for the heads up.