Matryoshka or Russian Doll is actually well-known symbol of Russia as well as Russian Bear, hehe. Nevertheless, this doll has a really important meaning into it: the Matryoshka symbolizes the continuation of life, fertility, wealth, motherhood. I'm sure, this doll needs to be created as a stamp. Thanks for reading!

P.S. I suggest to make the Matryoshka stamp as a Region Exclusive Premium Stamp but you can also make it free for limited time (the Matryoshka Day is celebrated on the 3rd January)