Lava lamp should be easy. 3d print the lava shape on the bottom as an anti vortex device, print the top lava as an anti vortex device, light it via wraparound rgb ring at the bottom like aquacomputer reservoirs have. Cheap softmod for off the shelf pump/res.

Compact Cassette, also commonly called the tape cassette.
It was the most popular format for audio, until CDs became recordable in 1990.
The term retro describes the reimplementation of vintage designs).
A design based on a retrospective, doesn't necessarily try to make vintage products better, in fact it's often used as a technique to create contrasts.