if you d just look around the website a bit you d see that yes you can. here is a direct link to customize your package and it does included getting tickets to disney world, seaworld, and universal.http://wdwpackages.com/custom/(i ve never been on that site before so i don t know how reliable their deals are or if they are any better than what you can get by going to each parks website.)
Why don t you look at the website and see?