If their eyes aren't opened yet, that means they're probably about a week old. MUCH too young to be without their mama. The eyes start opening on the 2nd to third week.

You might try and put the kittens in a Have-A-Heart trap in the area you found them. Put them in the very back of the trap so Mama has to trip the plate once it's set. If ANYTHING will get the mama's attention, it's the squealing of her own babies. Once she finds her babies, she won't move.

Call a local shelter and ask if you can borrow one. You may have to put a deposit on it, but at least you'll get it back when you return it.

If they SEEM healthy and aren't in harms way, my hunch is telling me to leave them there. The mama is around somewhere or those kittens wouldn't be alive.

If you decide to taked them in, you'll have to bottle feed them KMR every 2-3 hours, for at least 4-5 weeks before they're weaned to kitten canned food/KMR mixture. It's a big commitment and I've done it. It's like having a baby all over again.

Good luck. Please keep us posted.

If you need more help, just PM me.