Just go to any store that has lined paper! Look for the label "college rule". :)
One would think that any kind of diagram can be drawn on any kind of paper. However, lined paper might possibly lead to confusion if the lines are the same color as the diagram. In any case, it would look less than professional, and given the ready availability of unlined paper (for example, printer paper), why used lined paper?
It's possible to make craft paper but the texture will not be smooth. Any homemade paper will have much more texture to it than standard paper.
Its called transfer paper and you can purchase it at any craft store like JoAnne's or Michaels craft store.
You could draw vertical lines down lined paper to create your own.
Try looking up a website for that or visit a craft store and ask some employees if they have any ideas. If that doesn't work, try coming up with something yourself!
You can buy lined paper, or ruled paper, in any general office supply store like Office Max, Office Depot, Staples. You can try as well stores like Walmart, Target, Meijer's, and any other store that carry school supply.
pinterest.com has wonderful ideas for creating holiday centerpieces. Any craft store like a Michaels also has unique items and ideas for centerpieces.
Craft punches are small, simple punchers that can be used for any papercraft. Any paper or substance can be accurately sliced into a variety of designs, shapes, etc. These punches are particularly well-liked for paper crafts, DIY projects, and artwork.
The internet is full of ideas for paper gift bags. The website Pinterest have lists made by people. You could also ask people you know, if they have any ideas, or if you know someone who has any experience with making paper gift bags.
You should be able to find a great deal of do-it-yourself wedding favor ideas from any craft-related website, or craft stores. Try a site like: www.weddingstar.com/DIY-wedding-favors/all
Rice paper is edible. There is also potato paper available and frosting paper to use on cookies and cakes. Check craft stores like Michael's or Hobby Lobby.