What is the one thing you can give your baby

Ka

And it automatically calms them down? Doesn't have to be a toy. Mine, loves the remote. I sterilized the one we have for our living room tv and only use the dials on the TV now because he loves that thing. That and my hand. He loves trying to figure it out because I have a long burn scar on both of my hands and its rough feeling lol

What's your baby obsessed with?