Good question, Amber! When you open your Happy Home Network terminal, there'll be an icon in the bottom right corner. Just tap it, and you can scan house QR codes with your 3DS front cameras. One you do, I'll take you right there! It, uh, doesn't always work, though. In that case, use the button just above it. That one lets you visit designs by typing in their HHN address. Hope that helped!