Benham's Disk toy top

Date: Sat Mar 11 2000 - 13:14:17 PST


I am interested in ordering a Benham's Disk toy top for my science fair
project on optical illusions and Benham's Disk.
Your web page states
that the exploratorium strore has a selection of these tops, but I was unable
to find them on the Store web pages. Any help you could forward would be

thank you,
Grant Jasmin

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