Matryoshka dolls are traditional Russian nesting dolls. A set of Matryoshka dolls consists of one hollow wooden doll that can be pulled apart to hold another doll of the same kind inside. That doll has another doll inside, etc.  These dolls are usually brightly painted. There can be 6-10 dolls that all fit inside the largest doll.

P’yatnitsa is a popular Russian card game.  It is just like the card game War.  It is usually played with two players.  All of the cards are dealt face down.  Both players turn their top cards over, face up. Whoever has the highest-ranking card collects both cards, returning them to the bottom of their stack. The player who runs out of their cards first, loses the game.

Online Russian lessons for kids: dinolingo.com