Can i walk in at 18 and buy stuff

Yes

You may walk in at 18. The door plainly says 18+ to enter was there yesterday. If you dont believe call or check the website for more info.

I believe that since the law now requires you to be 21 to purchase tobacco products, you may need to be 21 to purchase products used for tobacco consumption. However, they also sell clothing, tapestries, and lots of other products. Hope this helps.