• Mathematical Sciences Research Institute (MSRI) (map)
  • 17 Gauss Way
  • Berkeley, CA 94720

From MSRI's website:

"Come celebrate math with puzzles, games, magic, stories, and more! Kids ages 8 and up, and grown-ups who are kids at heart, will enjoy this afternoon filled with hands-on math activities.

The event honors the life and work of Martin Gardner, former Scientific American columnist who inspired a generation of mathematicians and recreational math enthusiasts. In the spirit of Martin Gardner's love of Alice in Wonderland and with Halloween around the corner, come "down the rabbit hole" and explore with us!

This event is free and open to the public! Questions? Contact Jennifer Murawski at jmurawski@msri.org."

For more information, see the event website.