Soma 151. I' am a grandparent also. I have enjoyed taking my grandchildren on vacation when they come to visit to Disney and Universal. Universal has become our destination of choice when they visit now. Are you specifically locked into the idea of February? It is a cooler time of year in Florida. I live about 2 hours south of Orlando and the temps can drop down into the upper 30's and 40's at night then during the day time go into the upper 60's to low 70's. It was warmer this Christmas. The 80's. Which is a little warmer then it has been that time of year. We are usually a bit warmer than Orlando. All that said if February is a definite time you have to go I would just watch the weather. You can usually get reports 10 days out and pack accordingly. Also I' am not sure if the pools are heated at the resorts. You might give them a ring and find out. I do swim year round, but the pools are heated were I live. Even if it's in the upper 60's to mid 70's you can still get sunburned in Florida. Bring your sun screen. If you have 10 days I always count the first day as check inn day and pool day. If you are not going to have a car. You will have your first day of arriving by plane, getting car service, ( I would follow macravens thought and head to store for snacks and beverages for your room), get checked inn and settled. When we were at Disney we would head to Downtown Disney for a fun meal. Day 2 we head to The Magic Kingdom (which is quintessential Disney) Day 3 Hollywood Studios, Day 4 Animal Kingdom, Day 5 Epcot and then other days water parks. The perks of staying on site at both Disney and Universal is the transportation is provided to parks as well as the convienence of taking a break during the day and going back to hotel pool then resting and going back to parks. We had stayed at Pop Century the last couple of stays and I did our laundry in the laundry area by the pool that looks like gym lockers the evening before we went to Universal Studios. The day we check into Universal is again a free day to check inn and get settled, pool city walk etc. I love Universal Studios. It is our destination of choice now. We usually stay at Portofino Bay. They have a fun beach pool for the kids. There are 4 resorts onsite now. Cabana Bay is a 50's and 60's themed resort and is a moderate price (does offer early admission, one hour before open to general public as a guest, but not express pass) then there is Royal Pacific (RPH) Hard Rock (HRH) and Portofino Bay (PBH)( they also offer you as a guest early admission and they offer express pass). If you go to Universal site at the bottom of the page is a option to download and look at the site map of both parks. Near each ride is the height restriction value as well as the icon that tells you whether it is a express ride as well as other information. Why is express pass a value? Because it allows you to go into a different line and get on the rides quicker then if you purchased a regular entry ticket. The express pass is a perk to you as a guest of the RPH, HRH and PBH. If you tried to buy a express pass option in addition to your ticket for the parks it would expensive. There is a kiosk in the three hotels were you get your picture taken for your express pass. Everyone will get one. There is boat that takes you from these three hotels to the parks. My grandchildren like this. There are also paths you can walk from these hotels to parks. As noted above the parks are right next to one another and are more compact than Disney. There are two Harry Potter Themed parks Hogsmeade and Diagon Alley. You need a park to park ticket to ride the Hogwarts Express between Hogsmeade and Diagon Alley. Hogsmeade is in Islands of Adventure and Diagon Alley is in Universal Studios. Seuss Landing in IOA would probably be fun for your 5 year old and Woody Woodpeckers kids zone at US. I bought my 4 day Universal Park to Park tickets from
AAA and enjoyed the discount perks with my AAA in areas of the park were it applied. They also give discounts for Annual Pass holders, and American Express. Hope this helps. Have fun and enjoy making memories with your grandchildren. They will never forget it.