Wicked Mega Bounce XTR Our team of scientists experimented day and night with all kinds of crazy materials to make the ball with the greatest bounce force in the world; the Mega Bounce XTR! Drop it on a hard surface and the bounce ball jumps 85% of its original height! Throw down the Mega Bounce hard and see it jump away higher than a two-storey building. It's really mega! Specifications: Model: WKXTR Gender: junior Colour: yellow Material: plastic Diameter: 7 cm Weight: 68 grams Bouncing force: 85% Age: from 4 years old