aaronetz

It would be interesting to see the number of currently active users at the top of the page. Maybe even have sub-counts per comment thread. For example: you are at the front page. You see "521 active users". You click on the "comments" link of a story. You see "103 users viewing". What do you think?

My 5 year old son knows a lot of math for his age. He seems very interested in exploring it further (e.g. making up his own math problem, asking questions, etc.) We gave him a few Kumon books, but they are quite repetitive (and I don't want to associate math with boring in his mind.) I'm trying to spend time with him and show him interesting things (e.g. geometry, negative numbers, fractions, roman numerals, playing board games, etc.) but I can't be with him 100% of the time. Do you know any good, interesting math books / workbooks for young children, that encourage problem solving, thinking, and the love of math? Ideas for home-made activities are welcome too.

Thank you!