This is not a typical stack-and-nest toy. The weirdly-shaped pieces can be stacked and arranged any way you want. The vibrant colors are fascinating. The unique contours are inspiring! But then, nest them together, pull up on the smallest, and let your jaw drop.
The whole thing stretches into a tall, spiraling tower! - It's like magic! Beautifully un-intuitive design inspires hours of tactile discovery with SpiroKu.

Beginning with a single online store focused exclusively on magnetic toys, Fat Brain Toys company now boasts over 7,500 in stock toys, games, and gifts. Their mission is to enrich families and provide "A Smarter Way to Play" by inspiring creativity and sparking curiosity. They design and curate world-class toys and games, while providing an extraordinary customer experience.