Kids ~ some kids, anyway ~ can sometimes perform feats of memorization far beyond the capability of the average adult, because the little boogers just don't have much of anything else on their minds. Of course, this can only happen when whatever the young person needs to learn is something they really love and which has wholly captured their interest.

When my daughter was in 4th or 5th grade and taking some kind of theater class in school, her teacher got her a small part in a local community-theater production (i.e., with adults) of an original play by a local writer. The entire enterprise was pretty chaotic, because the author continued to change the script even after rehearsals had begun.

The adult actors were beside themselves trying to keep up with all the rewrites, but the one little kid almost always new the latest version of everyone else's lines! Why? Well for one thing, her own part was small and was not undergoing changes; but the main consideration, I think, was that the play was just about her whole life for those few weeks, whereas the rest of the cast had jobs, families to feed, mortgages, cars, etc.