It is a good show for children. It is addicting to them ,so be prepared.The children do fight often, and my friends sister started copying them(she is addicted:). It dose get annoying to parents and siblings but Totally fine for them:)
Nothing inappropriate except for the bad behavior. Some 2 year olds understand that you shouldn't behave badly but others might need a parent or older sibing to watch it with them and tell them to have good behavior.