This website, http://taggalaxy.de/ allows you to choose a category of photos that are then displayed onto a sphere.  The photos all come from Flickr, the website that archives millions of photos.  The first example here is showing photos when the tag "frog" was used and illustrates how the photos are placed onto the sphere.  It is mesmerising!  By using the PrintScren key on your keyboard you can grab any of the images for classroom use.  These images are not filtered so take care.

Frog photos arriving on the sphere

 

    

Photos tagged "leaf"