Please email to Dr. Tsing Bardin: her address is Tsingtb "at" earthlink.net. (Please replace "at" with @), or write to TBardin@ccsf.edu, if you have any questions or comments or if you would like to contribute in this site.

I welcome any Physics Toys or Physics Contests activities that have been successfully tested. Please let me know. I will be very happy to publish them for you here with the proper credits.

Tsing Bardin