[ at first, tsurumaru thinks of the usual souvenirs — i went to the jungle but all i got was this dumb t-shirt, and such, but then he remembers something that he's seen before. ]

What about... a cool toy?

[ right, because that's definitely specific enough... ] It's made up of a lot of wooden parts, and there's this rotating thing at the end, like a music box. If you turn it, all of the wooden parts move at once.

It's a wooden thingamajig!