Jan, I just spent 30 minutes there on that tut site. Angelbear does have the challenges. This site we cannot use, so the answer is no because the site has at least 4 images that are not "G" rated. We cannot link to that site. Furthermore this image is a nono. It is the artwork of Ruth Sanderson who does not give permission. This tut site has no regard for the artists. No credit is given to any, and there are several nono artists she is using.
If you find a site that you would like, I will be glad to check it out. You could google for unicorns, check out the artists. If they don't have any adult/mature images, we could write for permissions to add them to ours. Remember you can only make tags using the artwork from our permissions in the safe tubes and the artists. We give credit where credit is due. I will also try to find some artists that does unicorns for you.
Sorry about this particular tut site.
Hugs
Jacque