A few weeks after the Mane Six have defeated Tirek, Twilight gets a visit from Princess Celestia and Princess Luna. While they're visiting, Cheerilee comes over with the CMC, who want to find something to do for a school project.

Twilight kindly shows them to the castle's library, which looks like her own before it was destroyed, but much, much bigger.

During their search, Sweetie Belle finds a spell she thinks makes skin look younger and tests it out for her sister later. Twilight and Celestia, realizing it's a Regression Spell, try to stop her, along with Miss Cheerilee.

The result is Celestia becomes a toddler, Cheerilee a foal and Twilight a small filly, the same age she got her Cutie Mark.

Now, whilst everypony tries to figure out how to reverse the spell, Luna has become the temporary mother of two of the now youngest and oldest ponies and the big sister to the middle one.

Will they find a spell to cure them? And, if they do, by the time they find it, will they want to?

Or, is there more to the Regression Spell than first thought?

Rated teen for protective Mama Luna XD

Popular Stories 2-4/8/2015.

Coverart found here, but I changed Celestia's mane colour and gave Twilight her Alicorn wings so that the image fitted the fic, which, if you read the post, is within the lines of what chojomeka challenged any who saw the image. The wings may look bad, but I had to work with Microsoft Paint, so it's the best I can do.

Also, anyone who happens to have an account on the SpaceBattles website, could you please let chojomeka i took on his challenge.