So many questions for a first post [:O]
The town is ridiculously flat, which helps with buggies, main roads are surfaced, side roads generally aren't and pushing a buggy can be hard work (yes folks I HAVE done it
) - so where you are staying will be relevant.
Quite a few parks/kids swings/slide areas, not Alton Towers but fine. Beach is shingley, not particularly crowded. The sea is not warm in May but UK holidaymakers don't seem to care
Not sure on goats milk, I'm sure you can (there are enough goats here) but where to get it from I don't know, someone else can answer that one.
Please take a few minutes to say hello in 'Member Introductions' and have a good holiday. We brought our kids on holiday to Calis when they were two, and it was a great place to be with little 'uns.