Here's another second-hand penguin I don't know the origins off. It is a tumbler doll for toddlers – when the penguin is pushed, it won't topple over, but waddles. As the doll also has a bell inside, it makes jingly noise as it swings about.
The latter part made bringing it home quite an experience. When I brought it home, it was around midnight and since I didn't want to wake the entire apartment building by ringing the penguin in the stairwell, I had to move very s-l-o-w-l-y. I felt like some bomb disposal guy carrying a mercury switch device, all for a cute toddler toy!