それいけ!アンパンマンのひらがなあそび はじめてのあいうえお

An educational Sore Ike! Anpanman OVA. The classic characters Anpanman and Baikinman help "N" get back to Hiragana Land to find his place there. While there, they enjoy lots of things found in Hiragana Land.

(Source: AniDB)