A lens kit for my mobile phone camera – a fish-eye lens and a macro/wide angle lens. Just clip it on and snap away!
But it’s not a simple as that. First you need to get the clip (minus the lenses) in the right place, and add the lens of your choice (they are quite small) – then you can take your photos.
Outdoors
Indoors.
.
Slugs or snails?

Hours of fun to be had with this kit, once I get the lens in the right place on my phone.