Step 1- Find or purchase the frame of your choice.
I got this one from IKEA. Can't remember the price, but it was inexpensive.
Step 2- Use chalkboard paint to cover the glass, plastic or cardboard insert that comes with the frame. If you are using a frame without either, you can cut an existing piece of cardboard or other medium down to size. Be sure the type of chalkboard paint you are using will work with what you're painting it on. If not, you may have to use a primer.
Step 3- After 2 coats of the paint dries, insert chalkboard into frame. I used velcro wall hangers to mount on babygirl's wall. I put it pretty low, so that she could sit or stand and draw on it.
Hours of fun for just a couple bucks!