when you look up at the night sky full of stars, you don't need to be convinced. it's right there in plain sight. but wait, here's something — try explaining stars to a child. explain to them that they are made up of the same materials as one. tell them about the moon, it's phases. chat with them about seasons, sunsets and strawberries. go into great detail about how these little red berries just grow and when they're ripe you simply pluck their sweetness from a bush then pop it into your mouth. tell them about pineapples. have you ever seen a baby pineapple? it's perfection. and coconuts? list all the ways that coconuts are lessons in abundance. afterwards, try to describe how trees talk to each other, through an underground system we can't even see. oh, and don't forget to tell them how those same trees also help us to breathe. 
go ahead. explain all this to a child. 
see if you can say you don't believe in magic.