NSI Tiny Wubble Fulla Marbles - Mini Bubble Stress Ball Toy for Kids & Adults - Fun Sensory Fidget Toy for Office, Classroom & Anxiety Relief

Rated 3 stars for durability. The ball itself is cool, much smaller than expected. My son made quick work of it and there were soon beads all over the floor for me to clean up. My son loves this kind of sensory stuff , so if the manufacturer spent a little more on the material to make this more durable, I would consider buying again.