As far as I can see, most of the children were baptised in the Baptist chapel in Llanfwrog* - available on Family Search. They refer to The Genealogist for full details , although I think both Ancestry and FindMyPast also have non-conformist records.
http://www.bmdregisters.co.uk/ have most of the non-conformist records. I don't have any credits there at the moment or I'd look in more detail. I've also got the Blackwell Index (non-con registers for Denbighshire) and will check that shortly. However, many non-conformist registers are missing, especially the earlier ones.
*Mwrog Street Baptist Chapel, Llanfwrog
Gadget