This two-part greeting card has an inner sleeve and an outer sleeve. To bring the card to life, place your fingers and thumbs at the sides of the card and slide the inner sleeve relative to the outer sleeve. The effect will be that the people start dancing. Copyright Rufus Butler Seder. Product of Eye Think, Inc, Boston MA. U.S. Patent No. 5,901,484.

This two-part greeting card has an inner sleeve and an outer sleeve. To bring the card to life, place your fingers and thumbs at the sides of the card and slide the inner sleeve relative to the outer sleeve. The effect will be that fish swim across the card. Copyright Rufus Butler Seder. Product of Eye Think, Inc, Boston MA. U.S. Patent No. 5,901,484.

Made by Eye Think, Inc, USA. This is the brainchild of Rufus Butler Seder, president of Eye Think. When you hang the disc from a thread and spin it, you can see the cat running.