this will be our first trip to orlando so not really sure what we should be buying. A friend of mine told me we'd never get all the parks done in two weeks...is that true?

We have 3 three children, 10, 7 & 5, they all love fast scary rides and water parks and we'd like to try and do as many of the parks as poss.

What tickets should we buy? the new disney/universal one looks good, but really need advice.

TY
c