Kiki: 「わたしのおやつをとったらただではすみませんよ。」

= Watashi no oyatsu wo tottara tada de wa sumimasen yo.

= If you steal my snack, you are not going to get away with it.

Jiro: 「早くこのレッスンを済ませて遊ぼうよ！」

= Hayaku kono ressun wo sumasete asobou yo!

= Let’s finish up this lesson and play!