Is there any alt coin that's worth mining on small scale?
not looking for huge profit, just taking it for learning.
Ethereum coin is easy and simple to understand the mining platform. Because you should monitor the temperature is must for the mining. But you are looking for small scale mining so you should try your home is harmful. It make more heat in your home and it consume more electricity. But you should gain knowledge and little profit. You can invest more mining rig you can get more profit.
Do you have any real life experience to back up the claims you make above?
I disagree on the following :
"monitor the temperature is must for the mining" - On a small scale this is not necessary, CPU mining will produce heat but in my opinion not enough to warrant keeping track of it past the first day. On small GPU scale I set the fan speed or plan and forget it.
"small scale mining so you should try your home is harmful. It make more heat in your home and it consume more electricity."
CPU mining doesn't pull a lot of power like GPUs can. I don't see how it is harmful either, granted you have a stable rig and proper wiring in your house, but that would be the case for any electronics.
What are you planning on using to mine, I can make some basic suggestions.