Was expecting something a bit more for the hype and the money - adults and children pay the same (£10) so it does add up. We did have some £1.50 off vouchers from one of the cornwall tourist books that are around (they had some on the stand in the reception area).
This is basically a 'farm park', so if you have young children you've probably been to quite a few of these already.
Outside there are animals (pigs, llamas, goats, ponies) in paddocks and an okay sized children's play area with cages around with birds (parakeet, peacock, turkeys, chickens). Also another play area mainly for older kids with zip wires.
The unique selling point of Dairyland is the cows, and you can see them going to be milked and go into the milking parlour. There's an exhibition in the milking parlour about where milk comes from, history of commercial milk, etc. so there is an educational element if your children are old enough and interested enough.
Indoors there's a barn with other animals (goats, ponies, calf) plus a chance to stroke some animals (when we were there a guinea pig, rabbit and rat) which was good, also a couple of slides. The other main indoor thing is the play barn (soft play with big slides) which is excellent. Really good under 5's area and the stuff for the older kids is good too (a couple of really scary drop slides will probably keep even older children busy for a while). There's also a cafe there so parents can sit down and keep an eye on the kids.
There are undercover picnic areas as well as outdoor picnic tables, though I think that if you came here when it was raining half the park would be wasted, as you would be more or less confined to the play barn, barn with animals and milking parlour.
The four children we were with (ages 2, 3, 5 and 8) all enjoyed it a lot, though the main enjoyment was the play areas as the animals weren't anything they hadn't seen before. Although we visited during half term it wasn't that busy so we didn't really need to queue for anything there. Can also go on a walk around the pond though it was pretty muddy when we went so we didn't bother.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC