My eldest is 5 and none of those things are fun at all.
Cinema - we tried this at 4.5 and they were bored and playing up within 30mins and we had to leave.
Zoos - normally massive, they start whinging after a few hours as they’re tired from walking and want to be carried.
Bouncy castles - they usually get accidentally body slammed by a kid twice their size and it ends in tears.
Ice cream - they drop it (again, tears), don’t eat it quickly enough so it melts all over their hands and clothes, it ends up binned or I have to eat it.
playgrounds - not quite big enough to be let loose to play by themselves, still requires a lot of hovering on the adult’s part to avoid falling off an 8 foot climbing frame and cracking their head open. Also, mind-numbingly boring.
Am I doing it wrong?! I find all of these things stressful. I can’t wait for the days when they can do all of these things without such an extreme level of hands-on attention, and can get through films and day trips without getting bored, having tantrums and playing up.