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I think it's this one:
Homedics Sound Spa Lullaby Relaxation Machine
That is one of them...the other is something like this sold at BB&B:
https://www.amazon.com/Homedics-Sound-Lullaby-Relaxation-Machine/dp/B000X0KFKM
Sorry it's not clicky...it plays soothing stuff - sounds/music...
Re: What is the baby crack machine that everyone speaks of?
I think it's this one:
Homedics Sound Spa Lullaby Relaxation Machine
That is one of them...the other is something like this sold at BB&B:
https://www.amazon.com/Homedics-Sound-Lullaby-Relaxation-Machine/dp/B000X0KFKM
Sorry it's not clicky...it plays soothing stuff - sounds/music...