Footwear alone.
They grow fast
At first
Nappies, bedding, extra washes, clothes they grow out of every X3 months.
If not breastfeeding bottles, steriliser
Car seat, buggy, moses basket, cot, baby monitor, baby carry,sunhats, sun cream, teddies, toys.
Then you need baby steps, potties, reins, ride ons, bikes.
As they get bigger swim class, or sporting activities, more bikes bigger ones, shoes and shoes, school uniform, lunches, you might want music lessons, instrument, swim suits, goggles, cycling helmets,
Reading books, art and craft bits, board games, panto tickets, Santa, all Christmas magic shit.
Cinema, bowling, ice creams, buckets and spades, crabbing sets, drinks out, snacks, pancake toppings, Easter eggs, birthday presents, Christmas presents, school dress up day, donations to PTA.
Clothes, trainers, rainjackets, wellies, bedding, Lego. Harry potter wands, plastic dinosaurs.
Then phones, trips away.
Driving lessons
Help with uni costs
Might have to help with housing deposit.
Holidays during school holidays so not just more travellers the costs skyrocket
You are right the bit of extra food and extra electric isn't that much extra. But it's single digit percentage of what kids costs.
This is without childcare. Or drop in household income to accommodate no childcare needed.
And they break stuff, just playing, but they break stuff. Doors, seat belts, beds, shelves, toasters, bikes, school bags, wands, they break loads of stuff.
But you love them
But fuck me they are expensive.
It's averaged out (including childcare) about £250k (net) per child, 0-18. So grand a month for 18 years per child.
This is no where near a full list.