Many companies sell graphic cards for laptops. Local retailers such as Best Buy and Walmart sell graphics cards. Other companies such as Newegg, PC Nation, and Dell sell graphics cards for laptops as well.
they are at target but they don't even sell them at walmart -- You can purchase Club Penguin Membership Cards in both Target & Walmart. Unfortunately, I only saw 6 month cards in Walmart, then again, my local store could have been sold out.
Many stores that sell board games, such as Walmart, Toys R Us, and local hobby shops sell casino style playing cards and chips. One can also purchase cards and chips online from websites like Overstock, Dice702, and Newegg.