積み木で遊んでるの? ルーシーも仲間に入れてくれる?
Are you playing with blocks? Can Lucy join you?

 ここにもっと(ブロックを)積んでみようよ。ここはもうちょっと高い方がいいね。
Let's stack some more blocks here. This part should be a little more higher.

 そんな高く、どうやって作ったの? 感心したわ!
How were you able to make it that high? I'm impressed!