Rattleback – Physics in Motion A fascinating toy that demonstrates rotational physics and motion reversal The Rattleback is a captivating physics toy that spins in one direction—but when spun the opposite way, it mysteriously rattles and reverses its spin. A favorite among science teachers, students, and curious minds of all ages. Demonstrates principles of rotational inertia and asymmetrical motion Visually and physically engaging for hands-on learning Made from durable plastic in assorted colors Great for physics classrooms, science centers, and gift shops Recommended for ages 6 and up Made in the USA Only sold in increments of 24 (case pack of 24)