I just got this recently and I thought it was just the most amazing thing! So naturally, I just had to share. It's the AirWick colour changing candle. Mine is Apple Cinnamon, which just smells amazing.
The candle literally changes colour every 1-2 seconds or so, Yes these are ALL photos of the exact same candle.. If you turn oft the lights its just mesmerizingly beautiful and in my opinion a great meditation tool. I just adore this! There are a few more colours in there, There is yellow and violet in it too.
If you can get your hands on one, just turn off the lights and enjoy! :-)