1st time Cruiser wondering: I already "registered" my 3.5 year old for Oceaneers (via the internet). So I'm confused: what happens after that? Do I also have to reserve specific dates and times for him to participate? If so, how do I do that? And how do I find out which activities will be held on each day/time so I can pick and choose? If not, then, what happens? You come by and participate when they are open? Thanks for putting up with this 1st timer's questions!