The National Geographic Jumbo Building Blocks 30 Pc set is made of extra thick cardboard, making it durable and sturdy for endless building adventures. With a castle theme and builder set name, this toy is perfect for both boys and girls who enjoy creating and constructing. Made by National Geographic, a trusted brand known for their educational products, this set is sure to inspire creativity and imaginative play in children. Ideal for developing fine motor skills and problem-solving abilities, this building toy set is a great addition to any child's collection.