Check the listing for details. Smart Boxes Elastic Science Professor Ein-o Explore the Bouncy Stretchy Properti. Condition: New. Listed at 12.99 USD. Discover the wonders of science with the Smart Boxes Elastic Science Professor Ein-o toy from Tedco Toys. This educational toy is perfect for kids aged 8 and above, and is designed to introduce them to the principles of elasticity and physics. With its bouncy, stretchy properties, this toy is sure to provide hours of fun and learning. Explore the world of science with Professor Ein-o, a quirky and charismatic character who is passionate about teaching kids about the natural world. This toy is a great way to encourage kids to learn about science and nature, and is perfect for those who love to experiment and explore. With its high-quality construction and attention to detail, this toy is sure to provide years of entertainment and education.