Newton'S Cradle Balance Balls, 5 Beads, Each

Details:

Size: 5.4 X 4.7 X 5.8 Inches; materials: solid wood, fishing line, stainless steel balls & structure; occasions: science education supplies, stress relief, leisure, birthday gifts, holiday presents, business gifts; what's included:1 newton's cradle for your desk knick-knacks and accessories collectio