Some stuff to get back to for from a cursory search on whether Logo is still out there:
what a gui for this looks like:
http://logo.codeplex.com/
more than just logo:
http://www.marshallbrain.com/kids-programming.htm
Here's the google search. Every link on here looks good:
http://www.google.com/#sclient=psy&hl=en&source=hp&q=logo+programming+for+kids
