Dressed in sailor uniforms or cowboy hats or painted in bright pinks, blues and reds, rubber duckies – the kind usually found floating in a toddler’s tub – are now bobbing to faraway places as part of a global scavenger hunt taking over cruise ships.

If you’re cruising this summer, you might find a duck in any number of places on your ship – behind potted plants, balancing on door knobs, or poised on top of signs. They’re part of a whimsical trend among people who frequently vacation on the seas.