Description: 【Quality Newton's Cradle】: This unique Newton's cradle Pendulum Balls features 12 metal balls, a sturdy wooden base, and sturdy line, ensuring long term performance and a sleek appearance 【Mesmerizing Motion】: Enjoy continuous motion with this cradle. Its ability to change trajectories makes it both beautiful and entertaining, making it an ideal gift for birthdays or Christmas for both children and adults 【Charming Desktop Decor】: Ideal for home or office settings, this decorative piece adds charm to any desktop. Take a break from work to quietly watch the soothing motion of the metal balls, helping you relax 【Versatile Use】: Suitable for scientific education, psychotherapy sessions, relaxation activities, leisure entertainment, as well as being an good choice for birthday presents or business gifts 【Material】: This educational toy is made of wood, environmentally friendly pp to ensure durability and safe for children Specification: Material: Wood Size Chart: 44.5cmx31.5cmx37cm/17.52inchx12.40inchx14.57inch Package Includes: 1 Newton's Cradle Pendulum Balance Balls   Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.