We are planning a trip to WDW in April of 2009 with our 5yo DS and 3yo DS. We are going to spend 4 days at WDW and I'm debating making a week of it in Orlando and wondering if US/IOA would be good choices for younger kids like ours, or if the attractions are more geared towards older kids and adults. Our older son is big into Spiderman, which is why I thought this might be a good choice, but I don't want to take him somewhere where he (and his little brother) are too young to ride on or enjoy most of the attractions. Any thoughts? Also, would you recommend either Universal or Islands of Adventure for that age, or should we visit both?