To be fair - I'm struggling with WFH days this Easter holidays and a bored 4.5 year old DD. She usually goes to day camps - 1-2 days or more or to her nana's house or if a friend takes her for the day then there.
Next week is fine as we're off for a week to Bath which is to see brother's in-laws family and more to do there.
I was mentioning this predicament - the shorter holidays - Easter rather than half term to my DM the other day as I recall especially at Easter but also in the summer holidays - she had no money when we were kids but we stayed in from recollection:-
an old farmhouse in Sussex countryside - near Bodiam Castle and an approx. 30 minute drive to Cambersands beach which was ideal for days out. The farmhouse was divided into 2 parts - we had the larger part and the farm family had a normal house nearby. From there we could go and play in silos - until we were told off by farmer - oops! There was a small safe stream nearby where we played watched by an adult and lovely garden.
Farm used as retreat type place in Avon countryside - near a river and canal and near Bath - donkey in field, playing laying coins on railway track and watching trains squash the coins, we went to a small swimming baths with a slightly older 'new friend' who was a girl locally - she knew the owner of the farm. The farm was a holistic place with hot tubs and rebirthing...
Holiday bungalow in Sussex countryside near Littlehampton - the garden opened out onto a river which went down to the sea, rarely went to the sea but played in the river, made friends with little girl in static caravan park, did a few horse-riding lessons locally, saw a barn own one afternoon in the shade of trees in the garden.
Essex seaside coast - recall seeing old wet wooden boat timbers - Mary Rose?! Stayed with family friends again in old weatherboard/wooden board house - one Easter I recall me and my brother and our friends who were with us from London going to the village bakery and buying hot cross buns in huge quantities, hot and delicious and returning for them during the morning/day! Don't recall doing much else there apart from wandering round village, graveyards, churchyards.
The above is slightly a taster of a different childhood - but from age 8 me and a friend were allowed to get train/bus to nearby town and swim - no mobile phones then but had money to ring people. Also went into nearest town 10 minute walk away for old fashioned sweet shop trips, pet shop trips etc.
Some friends of my mum landed her approx. 3-4 years ago with an 8 year old and 10 year old brothers for a week days - mum was foxed as what to do with them until a neighbour a few doors down suggested her son also 10 hang out with them - they went to parks, borrowed bikes, went to see local aquarium/lizard/snake shop and generally did 'boy' stuff but were out all day apart from visits home to my mum's house to replenish food and funnily enough the older boy (10) came back with tweenage boy cheeky 'swagger' after a few days, not rude just cheeky! Did them the world of good and they soon forgot their parents - 8 year old just tagged along. Surprising how they did stuff but they were also allowed as a few of them to get bus 20-30 minutes away into nearest large safe town to 'shop' or do stuff that was more interesting than around locally and also to swim in the local pool - 15 minute walk away.
My DM was a teacher and unless she was taking us and lots of other kids out on day trips (she did this) she also invited kids into the house - friends of ours. If we weren't doing anything - like in a huge paddling pool with big sides in summer, or playing, then they'd watch her make bread - a few friends recall watching her making bread!
If your kids are happy playing at home OP then that's fine!