It's Breakable.

When we were still getting used to BG walking, we hadn't thoroughly baby-proofed (oh, we thought we had, but believe me, where there's a will, there's a way). So, whenever BG would get something it would invariably be something that was fragile, valuable, and we thought impossible for her to get. She'd grab it, and we'd say, "No! Please put that down, it's breakable."

So now, whenever BG has something she isn't supposed to have, I will say, "BG, please put that down."

She'll chime in, "It's breakable!"