Most likely they will be so tired if you go early to the parks that they will not make the full length of the party. Especially if you let them join in at one of the dance parties with characters, 5 and 7 year olds tend to tire themselves out pretty quickly and the adrenaline will only keep them going so long before they will crash. If you really want keep the 5 year old going longer use a double stroller, not much you can do for the 7 year old but a stroller will probably give you an extra couple of hours before the 5 year old starts getting worn out.Staying at AoA with kids ages 7, 5 and 22 months. I'm leaning towards resort/pool time and maybe going to Disney Springs before going to MK at 4pm. Im not sure if going to a park first will tire them out.