Hello everyone.
I want to use this water solenoid valve on my project.
It’s working voltage is 12V (minimum 6V). I’m really new to hardware and I don’t know how to apply such voltage while Spark Core can only apply 3.3V. 
Is there any shield or anything that can make it works?
Thank you very much for your kind attention and your help,
Terminox.
ULN2803A or 2003 darlington array or a NPN transistor or a logic level N-channel MOSFET…
in fact a bit of googling answers this exact question it seems:
@sej7278 Thank you very much for your answer. 
I have tried using transistor before I created the topic but it doesn’t work. (and my Spark crashed lol) Maybe I did somthing wrong. I will try again. 
Terminox.
Here an example with a relay to cover the 12v circuit: