"Your school might not have a 3D printer yet, but your students can still create 3D models online with these free online tools." These tools can be used on a variety of devices, including iPads, Mac, Windows, and there are a couple that can be used on Chromebooks.
This is a 'must try' iPad app where you can design a 3D creature. Tap, drag and pinch your creation until it is just right and then 'paint' it with the patterns you want. It's a great resource to use alongside creative writing or science work. If you have access to a 3D printer you can even fabricate your design. Download the app at https://itunes.apple.com/us/app/123d-creature/id594014056.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
"View over 200 3D models of historical objects from the British Museum. Manipulate the models online, view using Google Cardboard and download the models to print on a 3D printer."
Design your own cookie cutters and print them on a 3D printer. You can draw your own or start with an existing image.
Suggested by Corey Kilbane, 12/12/2013