Frisk pets the tinsel, decides they like a particular pink one, and starts disentangling it as best they can. Finally, neat stuff that's reachable.

They frown again once the other kid makes noise, but...that's a weird thing to say.

There's windows in the back of the room. Plants need light to grow!

Frisk tries snapping their fingers like Papa did, but it just looks silly. They push a button instead to get the weird kid's attention, then point at the windows. Butthead, there's trees right out there. He just might need to pull himself up a little to get a good look.