こどもが大好きなわんぱくだんシリーズの絵本。かいていたんけんは特にお気に入りで何度も読んだ。わんぱくだんの冒険物語にこどもも大人もぐっと引き込まれていく。年長さんぐらいにいいのかなと思っていたが、小学校の図書室でこのシリーズが２年生にオススメの棚に入っていた。幅広い年齢で楽しめる絵本だと思う。小３の娘もこのシリーズが大好きだ。
プールあそびをしていたわんぱくだんの仲良し三人組。「せーのっ」で潜りっこするとそこは海の中。そして、海で出会ったイルカとともにドルフィンランドへ（仕掛で見開き楽しいドルフィンランドの世界が描かれている）。イルカは海の底から巨大渦巻が出ていて、海の水がなくなってしまうのではないか心配していた。くみはイルカがくれた髪飾りで渦巻の穴をふさぐことを思いつく。
あわせて読みたい：978-4893258939, 978-4-89325-605-8
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A picture book of the Naughty series that children love. I especially liked Kaitetanken and read it many times. Children and adults are drawn into the naughty adventure story. I was wondering if it would be good for an older person, but in the library of an elementary school, this series was on a shelf recommended for second graders. I think it's a picture book that can be enjoyed by people of all ages. My 3rd grade daughter also loves this series.
A good friend trio of naughty people who were playing in the pool. When you dive in "Se-no", you will find yourself in the sea. Then, I went to Dolphin with the dolphins I met at the sea (the world of Dolphin is depicted with a work-in-progress and fun). The dolphin was worried that a huge swirl was coming out from the bottom of the sea and the water in the sea would run out. Kumi comes up with the idea of closing the swirl hole with her hair ornament given by the dolphin.
Japanese title pronunciation：Wanpakudan no kaitei tanken
Writer: Yumiko Yukino, Yoshi Ueno
Illustrator: Shigeki Suezaki
Category: Fantasy, Cute illustrations
Adult reading time: 5 minutes and 45 seconds
First time published: June 1996
Read together with: 978-4893258939, 978-4-89325-605-8
