Hi Jane,
Eleven days at Walt Disney World Resort! What an amazing vacation, you and your family will certainly make magical memories that will last a lifetime! Many guests choose not to purchase Theme Park Tickets for arrival and departure days, depending on flight times. Ten days is plenty of time to explore The four Theme Parks, and there are many options for your last day when you will not need to use a Theme Park ticket.
Downtown Disney is a great place to spend a few hours where you can do some last minute shopping, have a great meal, take in some fabulous entertainment, try your luck at Splitsville Luxury Lanes, or even spend some time at DisneyQuest Indoor Interactive Theme Park.
Another option would be to challenge your family to a quick game of
Miniature Golf at one of Disney's Two Miniature Golf Courses - Disney's Fantasia Gardens Miniature Golf Course or Disney's Winter Summerland Miniature Golf Course.
Personally, for me, I like to spend my last day at Walt Disney World Resort relaxing. My family and I always have a late breakfast (keep in mind you are able to go to other resorts to dine), and then take some time to explore our resort for the last time. This is a great time to take a few more pictures around the resort, and good for some last minute shopping as well.
I hope my suggestions help Jane. If you would like more details concerning one of my suggestions, or would like some other options, please let me know. I would be happy to help.
Stephanie