Kaleidoscope phone strap. I've always wanted a kaleidoscope ever since I encountered one in my school science lab. So when I saw the miniature version in a gachapon machine I thought why not. It may be an old gadget for today's technological standards but amusing nonetheless. My favourite themes are psychedelia so kaleidoscopes are just my cup of tea.
The packaging below shows the 'Hanabi' (fireworks) pattern:
Here are some snapshots, it was hard to centralise my camera through the tiny peephole. Since it was a cheaply made kaleidoscope the mirrors are a little 'dusty':
A kaleidoscope mechanism is pretty simple: colourful beads in a tube of mirrors set at angles to reflect a arbitrary symmetric pattern whenever the tube is turned and the materials inside slide around. There is also a kind of kaleidoscope without beads and it reflects images instead.
Here are some unique artisan-made kaleidoscopes and kaleidoscope-inspired finds from Etsy: