Poros is ideal for those that want to slow down to the Greek pace. Lots of small friendly Taverna's where you can eat. Have a drink with Spiros in a bar I cannot pronounce but look for the circular stone feature at the back of the bar which is located in the 'Square'in the central beach area.
Stay with Makis, Who, where and what he doesn't know isn't worth knowing. We took our 7 year old twins and they never got bored, we just got them a snorkel each and watched the top of their heads for 2 weeks in the pool, they played in the 'Square' with the very friendly local kids at night`. If we can get the time and the flights we'll be back this year.