と遊んでるよ

playing with

→ と
phrase Rare #27,259
playing with と marks the person or animal being played with. 遊んでる is the casual contraction of 遊んでいる, meaning “is playing.”
JA: ミカは外で犬と遊んでるよ。
EN: Mika is playing with her dog outside.

トム外でお兄ちゃんと遊んでるよ

Tom is playing outside with his older brother.

トムメアリーと遊んでるよ

Tom is playing with Mary's cat.

トム外でと遊んでるよ

Tom is playing with the dog outside.

猫がと遊んでるよ

The cat is playing with the dog.

トム友達と遊んでるよ

Tom is hanging out with his friends.

トム外でお兄ちゃんたちと遊んでるよ

Tom is outside playing with his older brothers.

トム外で友達と遊んでるよ

Tom is outside playing with his friends.