Whereabouts are you staying? I'm not sure where you mean by holiday village. Anyway, Playa Blanca is a fully functioning town, with several supermarkets, the best of which is the Hiperdino in the centre (not the Hiperdino Expresses which are like Tesco Expresses). The Spanish brand of disposable nappy is Dodot, which is similar to UK brands, and Nestle etc baby foods etc are readily available because Spanish women have babies too

Similarly fresh fruit veg and meat are readily available from supermarkets, and the fruit and veg in the fruterias are very good.
You can get fresh milk, but it doesn't stay fresh like it does in UK so we residents buy cartons of UHT. After the first day, you won't notice the difference.
The chemists (famacias) in town are excellent and modern, with staff who speak excellent English. I assume that you and your families have EHICs (used to be E111s) to give you emergency 24 hour health care in the local Centro de Salud - the state -run health centre. They will treat you free with an EHIC and passport (although you'll have to pay for prescriptions) unlike a private doctor who will charge you what could be a big bill. Monday mornings are always busy in doctors, with visitors saving up problems over the weekend!
Do consider using plenty of sun protection, especially for your children, because the sun here is much fiercer than in the Mediterranean, even if there is solid cloud. You could bring it from home, but it is readily available in supermarkets and famacias. It shouldn't feel too hot, because there is a always a cooling breeze - but again, don't let that fool you into thinking you won't burn - you will unless you take precautions.