Mail art refers to any art that is designed to travel through the mail, including faux postage, envelope art and postcards.

Learn more about mail art in this recently updated article, What On Earth Is Mail Art?

Here’s an enormous set of artist trading cards made by Arizona artist Mary Watkin:

I like these books from London artist Cathy Cullis. Clean and simple, but so visually interesting!

Tip or tip-in means to attach an item such as a letter or an illustration into a bound book by applying a narrow line of adhesive on one of its edges. A tip-in in altered books lingo is a page or set of pages that is made outside a book, and glued or attached into it later.

For more on tip-ins in altered books, try A Crash Course in Tip-Ins.

This set of colorful paintings by Brazilian artist Patricia Ariel is absolutely breathtaking:

If you’re an avid paper crafter, buy several pairs of scissors. Decide which scissors will accomplish what tasks and use them for only those purposes. Keep your detail scissors sharp and clean, and don’t be tempted to just grab them and cut something gunky. For a peek at the scissors and other cutting implements I have in my arsenal, try this article.

I love the fresh, bright colors of these collages from German artist Doro K:

Embrace your inner Jackson Pollock with this toy by Miltos Manetas that allows you to paint online in the style of the artist.

Need an inexpensive paint palette for craft acrylics? Try using an old magazine with glossy pages. Glossy paper will resist absorbing the paint, and it will simply dry on the surface without sinking in. Next time you want to paint, just flip the page of the magazine, and you’ll have a fresh palette. No clean up required!

Wander through the strange worlds of French artist Bousquet Georges: