This will be the main liquid in your lava lamp. Choose a food colouring and add a few drops to the jar, it should sink to the bottom underneath the oil. Adjust the amount based on your desired ...

Lava lamps are cult. They were invented in the 1960s ... However, when the lamp was switched on, the fuse blew with a big bang. On a second attempt with a new bulb (three are included), this ...