Good lighting in corridors and on stairs.
Particularly if tots will be roaming at night or trying to find parents' bedroom.
Bolts at top of back doors that littlies cannot reach to open when unsupervised.
USB ports. Alexa or Sonos or iPod docking station.
Good quality tv and streaming service.
Comfy seating. Books. Binoculars if there's a view.
Plenty of good glasses. I hate going somewhere and there's only tumblers rather than wine glasses.
Sharp knives.
Dishwasher and dishwasher tabs.
Coasters for bedtime water glasses.
Cushions for toddlers to sit at dining table if they're too big for high chair.
Baby monitor?
Buckets, spades, crabbing nets, body boards. Beach towels/haman towels. Cool boxes.
Extensive list of things to do, places to go. Vouchers and coupons and discount codes.
List of gps, pharmacies, supermarkets etc.