How did you come to have baby piggies?
I’m going to tag
@Wiebke as our pregnancy expert on what age babies can first go onto grass and any other considerations that need to be taken with ones so young.
What I do know is that any guinea pig has to be very slowly accustomed to fresh grass each year - same goes for adults every spring after a winter off the grass.
Too much fresh grass too soon will cause digestive problems and in such young babies it would be a huge problem. They certainly could not go out for a couple of hours - it would be a couple of minutes (literally 5 minutes if that) at most.
I spend lots of time handpicking small amounts of grass to feed to my piggies in their cage so the amount can be very carefully regulated and built up gradually over a couple of months before they get any lawn time (I start late winter before they first go into the lawn in late spring/early summer).
Temperature outside would also be a big consideration - babies cannot regulate their body temperature so could not go out unless the temperature range was perfect and not breezy or damp.