Drums, tambourines and xylophones are great for younger children because they are easy for smaller hands to manipulate and handle, while also teaching them coordination and how to keep the rhythm and beat. Percussion instruments are important pieces of ensembles as they help keep the time and the beat of the group.
A more common benefit that doesn’t necessarily take a super-skilled teacher is that the child will learn how to coordinate their fingers, their tongue and their breath – all 3 things at once – in order to play any tunes to a reasonable standard. That is a mean feat in itself for such a young child. Not only is this a skill that will serve them well for learning any future wind instrument, but the brain function required to get to the stage that this young child is now at, will, if I can be so bold to state it so plainly – make them smarter.