The Original Toy Company set of Matryoshka Madness Nesting Robots is an old toy made new. This set of 6 Space Bots is great sci-fi fun. Nest all your Robot Matryoshkas inside one another, or display all 6 - each size has a unique Robot design. Sizes of the 6 Robot Matryoshkas range from 4 1/2" to 1 3/8". Made of durable plastic for long-lasting fun. For ages 3 years old and up. Nesting dolls are traditional figurines that first appeared in Russia during the 19th century, but are now crafted in many different themes and sizes. The Original Toy Company nesting dolls, with their unique designs and durable materials, ensure these dolls will be adored for many years to come.