My kids were off school yesterday. My son had 3 friends (middle school age) over at our house. He fired up the Wii and those boys were mezmorized. None of the boys had ever played on a Wii before.
It took a short while to get use to the wiimote but it was a big hit. 5 hours of playing on the Wii. They had a blast. My son totally scored 'cool points' with his buddies.
To top it all off, the mail man delivered "Zelda TP" that I won on Ebay the other day which only cost me a total of $36.00 used. Plays perfectly too.