How to say “My son crumpled the paper placemat into a ball before the food had even come, that's how bored he was.” in Japanese
In Japanese
うちの息子、料理が来る前に紙のランチョンマットを丸めてボールにしちゃってさ。よっぽど退屈だったんだね。
Uchi no musuko, ryōri ga kuru mae ni kami no ranchonmatto o marumete bōru ni shichatte sa. Yoppodo taikutsu dattan da ne.