I've actually made Kid's accessories! I used large wooden beads painted and strung on twine for the necklace. The center bead I embellished with clay (paperclay in particular) for the shape. The belt was interfaced fabric, I think I used suede and then grommeted it. I made the dagger out of foam and clay and the sheath out of vinyl, sheath symbol out of craftfoam and tacked it on with a stitch or two.
Here's a link to my progress, if you'd like to see: http://www.facebook.com/media/set/?s...87028&type= 3
edit: If you can't find boots, find a decent base shoe and make covers.