Hi!
We went to Zante last summer, it was the best holiday we have ever had, the weather was beautiful, as was the whole island, we met lovely local people, beaches are sandy and the water so clear you can see little fish swimming.
My children were 11,8 and 6, we visited the waterpark, that was ok - kids loved it, and we went on a boat trip to see the loggerhead turtles or caretta caretta as they are called. That was an amazing day out.
Food is good and eating out is fairly cheap, souvlaki, gyros, kleftiko and stifado were all a hit.
It does get very very hot - over 40 degrees at around midday, take as much sun screen with you as it is expensive to buy.
We spent 2000 euro in 2 weeks - as a guide, ice creams were quite expensive.
Have a great Holiday x