Hi, Sandy!
Many of the attractions can seat 2-3 guests per row, so I think your entire family will be able to enjoy many of the rides together. Just thinking off the top of my head, it's a small world, Haunted Mansion, Many Adventures of Winnie the Pooh, Mad Tea Party, and many more will be able to seat all of you together, or allow 3 in one row/car.
When entering a queue for an attraction, ask the cast member if you can all be seated together or in 2 rows for your family of 5. If seating for that attraction is only 2 per row, ask if you can do a
Rider Switch so you can easily take turns.
No worries, everyone will be able to enjoy all the magic of the attractions at the Walt Disney World theme parks!
Cathy