At any Lego Store
At your nearest Lego store or Walmart.
Sadly Lego costumes do not exist, however you can buy weapons etc. from your nearest Lego store.
You can buy them at usually any Lego store or online
You can buy a Lego blind bag from a toy store such as Toys R Us.
You can, but most people buy it online.
As far as I know, only the online Lego store at shop.lego.com.
national book store
You can buy LEGO Master Builder Academy Kit 1 (Space Designer) on the LEGO Shop website (shop.LEGO.com) or at a LEGO Brand Store.
This set is a Toys R Us exclusive. Which means you can get it there OR buy it directly from a Lego retail store or shop.lego.com
LEGO is available for purchase in the following shops:WalmartZellerseBayAmazonThe official LEGO store onlineToys R UsTargetOr online at Lego, Amazon, eBay and Bricklink.
Lego store franchises are not available for sale to the general public. Lego does operate many stores that sell their line of products to the public. Lego products are sold at toy stores along with a wide array of other items appealing to children.