Hi Sarah,
Seven is a great age to visit WDW & you're going to have an awesome time. How wonderful that you want to start sprinkling pixie dust on her trip by customizing a map just for her!
You can find a list of the height requirements for each park at the
Traveling with Little Ones section on the website - click
here. On the right side of that page, you'll see a list of
Planning Resources. Under that you'll see a PDF file for
Attraction Height Requirements. Be sure you measure your daughter before your trip so you'll know which attractions she will be able to ride. Be sure you let her know ahead of time if there are any attractions that she is not tall enough to ride. That way you can hopefully avoid a meltdown at the park.
Also under
Planning Resources you'll see a PDF file for Magical Beginnings Park Maps. These might be a little juvenile for a 7 year old but check them out - they are colorful and fun.
To customize your own maps for kids a little older click
here.
Please let us know if you have further questions during your planning. Wishing you many magical memories :-)