Hello Candace!
I totally understand your concern because I have five kids with an age range from 12 years old to 2 years old! However, I am very excited to tell you that you will have NO problem at ALL finding Disney attractions your whole family can enjoy and experience together. In fact, there are MANY Disney attractions you will be able to ride as a whole family!
The best place to find out about all of the Disney attractions your whole family can enjoy, check out the
Attractions page at
www.disneyworld.com. Here you can narrow your search by Disney Theme Park, type, and recommended ages to find exactly what you are looking for. From your specific search, you can click on each attraction and learn all about each MAGICAL ride!
Now, there will be times when your seven year old will want to ride more of the Thrill Rides. If that is case, your family will be able to take advantage of the Rider Swap option. This option allows you to stay with your 20 month while your spouse rides the Disney Attraction with your seven year old. Then, YOU will be able to SWAP with your spouse and ride the attraction (with your 7 year old again...which is awesome) without waiting in line again!
If you have other questions, please let me know!
Have a MAGICAL day!
Wes