I'm looking for something inexpensive for me and my sister to share but I made it for her (I.e.-matching tshirts,music cd, memory video, jewelry)

I was thinking diary because she loves to write

Pinterest.com; Go into DIY and search hand made diary or DIY diary, go through the pins and see if there are any picture instructions or videos you can watch to learn how to make it. I'm sure there is a variety of ways to go about it so there might be a list of pins you can choose from. Hope this helps.

Another good idea is to google; DIY friendship projects or something similar to that. I got a lot of great ideas when I typed that in!