Himitsu no Akko-chan.

ひみつのアッコちゃん

The Secret of Akko-chan (ひみつのアッコちゃん, Himitsu no Akko-chan) is a magical girl manga series written and illustrated by Fujio Akatsuka. The story centers around an elementary school girl who is gifted a magic mirror that allows her to transform into anything she chooses, and the misadventures that follow. It was published in Shueisha's monthly Ribon magazine from 1962 to 1965.