Disney Infinity Fans

Okay, I have my first non-Nintendo console (a PS4) and thus...am new to this world.

Currently, here is what I have going on:
My account - linked up to my Playstation Plus account
3 accounts - one for each of the other family members

What do I need to do to set it up so that the other members of my family can do online play...how do I connect them to my Plus account? (PS FAQ says I can do this, but doesn't explain how)

Thanks!
John.

As long as your main account has a PS+ subscription, any other accounts on the system will be able to use the online features.