Here is a wave machine that puts on a relaxing show when you expose it to UV blacklight. This Lava Wave Machine features smooth movement and built-in wave sounds. The vessel measures 16 inches long. Non-UV reactive versions of this are also available.
These wave machines are rare but show up once in a while on eBay.
[HT]
Disclaimer: *Our articles may contain affiliate links. Please read our disclaimer on how we fund this site. As an Amazon Associate, we earn from qualifying purchases.
