The Puppetmasters
(when reading this post, it's best to imagine that I'm speaking in a nervous and desperate tone, arms waving frantically, eyes alight with paranoia. my more prescient readers do this already.)
"That toy over there…looks cute and harmless, doesn't it? You'd never think twice about letting your child cuddle up with it at night. You wouldn't be so sanguine if you saw its terrible true form—the strange and alien robot hidden beneath the fur."