Here's a quick tutorial (including templates):
Art canvases (Mine were 30cm x 30cm (12"x12"))
Fabric (I used quilter's weight cotton to match the quilt)
Medium-weight iron-on interfacing
Scissors and/or exacto knife
Paper and Printer (to print out template)
2. Iron interfacing onto the wrong side of the fabric (as per packet instructions). I use this to make the fabric a bit stiffer and to stop the fabric glue from seeping through, making the fabric hard and tacky. I prefer the soft fabric look and feel!
3. Print out the template from here.
4. Cut out the templates and trace onto the interfacing-side of the fabric (in reverse!). Cut the fabric pieces.
here. (Note: this is the first time I've linked to a google document - please let me know in the comments or via email if you can't access it!)
I've still got a couple more decorations for my son's room to show you - stay tuned!
Edited to add: I've fixed up the link to the template. Let me know if there are any more problems!