This equipment belongs to my now retired maths consultant wife.

The Learning Resources Connecting Cuisenaire Rods is a mathematics toy made of interlocking plastic rods. Developed by Learning Resources, this toy provides a hands-on way for children to explore and learn about mathematical concepts. The brand is known for producing high-quality educational toys, and this product is no exception. Made in China, these rods help children develop their problem-solving skills and understanding of number relationships in a fun and engaging way.