Hello Kitty no Yuubinya-san Arigatou

ハローキティの 郵便ゆーびん屋やさんありがとう

Kitty's and Mimmy's class find out that Yuubinya-san, their town's postal worker, is having a hard time delivering the mail in his old age. They try to give him a gift as a thank you for all his years of hard work.