Yes, and we love Bubbles, Rainbow, and Worms, too!
They used to have a Math book, One, Two Buckle My Shoe.
And if your kids are learning to read but hate reading and love Math check out the Step into Reading series and Hello, Reader - Math series.
And then there's the Brown Paper school book series.
But I regress...these days there are a multitude of math and science resources out there for young children and early readers that aren't just focused on creating "genius" but making learning fun and meaningful by creating opportunities for a child's whole being to interact with their world.