3 x Sensory Flexi Ball – Tactile UV Toy These UV Flexi Balls are made from durable material and are great for children to bend and squeeze. They glow when exposed to UV light, and provides children with both visual a sensory fun. Please note: Colours may vary – 3 items in random colours will be sent. Size: Diameter: 9 cm. Usage: Sensory/Visual effects Weight: Approx: 90 g.