What are the most essential to bring for a 2 year old when traveling overseas and also on the plane?

A whole variety of snacks, videos, toys, books too. Make sure to bring a comfort item of theirs too. That helped with my son on the plane.

I traveled with my son when he was two and I needed a lot of snacks and videos, few toys, and coloring items books . Make sure you bring lots of diapers and wipes close by because my son had the runs from jet lag after the plane .