http://www.shirleyvauvelle.co.uk/. What about fish inside the big fish?
Pinch Pot Animals | animal2.jpg
This is another example of air dry clay projects that a 6 year old could attempt. We have older brothers who need guitar pic catchers, paper clip and pocket change catchers, etc... Great Christmas gifts for children!
This would be a good way to experiment with textures.
Natural Ceramic Wind Chimes
Colored Porcelain Koi Fish Wind Chimes... may be a little out of elementary's league but I want to remember this.