まるです。

走りまわって遊ぶ　→　暑さで一休み　→　まだ遊び足りなくて寝っころがったまま遊ぶ
→　変な格好になる　→　笑われる　→　気にしない。
Maru played and was tired.
It is very hot in Japan recently.
However, do not worry.
He is very cheerful.