At this time, we've grouped these three tallboy animal shakers together as a series - although we believe there are most likely more to find that go along with them. The most characteristic feature that puts these shakers together as a series you can't see in the photographs. The bottoms are stamped with a series number "3729". Some have Japan labels as well.
But even without the markings, it is clear these tallboy shakers belong together because of there other characteristics - same eyes, cheeks, bows & flowers, and stamped "S" and "P" designations on their chests.
Check the markings of your tallboys and let us know if you have other examples that belong in this series.