Just taking baby on his first plane vacay and looking for tips...it’s only a 3 hour ride but..

Some of my concerns on the holiday:

- how to entertain baby if he doesn’t sleep on the plane. He’s in the stage where he’s wanting to be so active and crawling everywhere.

- we are renting an Airbnb there and right now to keep up a my boy, I have an enclosure play pen thing we play in... in the condo Idk what to use to “trap” him so he’s not getting into everything..

What are some must brings when it comes to travelling w baby??