I remember how delighted I was at the second grade Easter party when I found a nesting egg inside my treat bag with a little yellow chick in the very center. That egg is now and forever lost but I remember it fondly to this day.
And so I began reading these books to my little girls:
The Littlest Matryoshka by Corrine Bliss and Kathryn Brown
The Magic Nesting Doll by Jacqueline K. Ogburn/ Laurel Long
Sasha's Matrioshka Dolls by Jana Dillon/ Deborah Nourse Lattimore
...and buying more Matryoshka dolls for them to play with.