I posted this a long time ago, but thought I'd repost for newbies. I have a blog that I occassionally post tutorials on. One of the tutorials I have is on making an excercise wheel. I studies varies other tutorials on the web until I came up with something I liked. It does work and you can even tighten or loosen the tension on the wheel to give your babies a harder workout if needed.
Thank you so much for this post. It is so hard to find quite wheels with ball bearing in Canada, and shipping across border is almost the price of the wheel!