I took my kid to a really nice zoo when she was about three. I really enjoyed it. She purloined a plastic spoon from the café and every time I stopped to look at some animals, she got her spoon out and made for the nearest bit of dirt, where she dug a small hole. Which she could absolutely have done in the garden at home.
Another time, DH took her out to one of those kids' farms because I had a v important work deadline and needed her out of the house. They had a great day, fed goats, saw cows milked, bouncy castle, soft play, lunch in a café, etc. He even sprung for a souvenir soft toy which I would probably have declined to purchase. He brought her home, tired but happy, and I was delighted to have finished everything I needed to do. And he said 'so what was your favourite bit about the day, DD?' She replied 'seeing Mummy when I got home'. Poor DH.
We've holidayed in the same house every year since she was a year old. She doesn't remember one single thing about the holidays before she was 7.
And my dad has recently been digitising all the family photos keeps sending us stuff saying 'where was this, what year, what country'. I'm sorry to say I can't reliably identify anything before I was about 18. Some of these photos I have no recall of at all, and I would usually think I have a fairly good memory!