For those that grew up with Mr. Wizards World, you will be sad to know that he recently passed away at the young age of 90.  For details, his family has posted information at his website that he maintained; imagine that. 

 http://www.mrwizardstudios.com/

“For those of you who would like to share your thoughts on Don Herbert or anything Mr. Wizard related, we’ve decided to add a guestbook for your convenience. Follow this link for the Official Mr. Wizard Studios Guestbook.”