My son is keen on logic exercises. I don't know why but he prefers tasks without numbers and adores tables.
I collected a lot of different child-table tasks for him. But he wants more. All our findings that I have collected I shared at:
http://infant-prodigy.blogspot.com/2010/04/logic-to-children-part1.htmlPlease, if somebody know more table-games or tasks please share.