Ideas for things to do with kid AM

My son has his 5th birthday next week, but in the afternoon he has his pre-school. In the past years, I've taken the afternoon off to do something with him for his birthday like going to the trampoline park, etc but this year obviously by the time we get him from school, we have to make dinner, eat it, etc there isn't a ton of afternoon time available.

I was thinking about trying to do something in the morning but lots of places aren't open early enough for us to actually enjoy ourselves and still have time to get him to school. I have a few ideas, but I was wondering if anyone has any suggestions of things we could try!