Question about Frozen Ever After

Hello, I have a question about Frozen Ever After. Does anyone know if a 12 year old would be allowed to take her 2.5 year old brother on the ride or would the toddler need to be with an adult? (we would accompany them as far as the cast members would allow us to go in line) If we are unable to get FP+ for more than one person, we’d like to get one for our 12 year old and have her take her little brother. Thank you.

Looks like the actual rule is 14 being the minimum age to accompany a minor:

Thank you! We hope to be able to get 2 FP+'s then, one for our 12 year old and one for me to ride with them.