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Christopher Danielson

Talking Math with Kids

Supporting children’s early mathematical development

Books and Playthings Shop

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Pattern Machine

Pattern Machine

Be forewarned: you will not be able to leave the Pattern Machine alone. Perhaps you will make it your life's ...
Versatiles

Versatiles

Versatiles tile the plane both periodically and aperiodically. They make multi-armed spirals.
How Many? A Counting Book

How Many? A Counting Book

This follow up to Which One Doesn't Belong? brings the same spirit of playful mathematical fun to counting that its predecessor brings to geometry.
21st Century Pattern Blocks

21st Century Pattern Blocks

21st Century Pattern Blocks introduce new shapes, new colors, new relationships, and new possibilities. I can’t wait to see what you all make with them. They play nicely with the original Pattern Blocks that are ubiquitous in American elementary classrooms, sharing the 1-inch side lengths of the classics.