No children under 12 are not required to wear a mask.

Nublado pero no pasamos frio

I found the answer for this so I will leave it below as it may help someone else. The tickets are valid for one year from the date of purchase and you can modify the date of visit on the Siam park website. You do not need an updated ticket. The ticket from the original confirmation email will still work (even though it states a different date).

Yeah it is fine. We went on the 5th of October and it was lovely. On some rides there are water jets that are a tiny bit cold but overall the water is a nice temperature.

Most of the slides which use rubber dinghies have a minimum capacity, usually 2 or 4 people. If you do not meet the minimum capacity they will put strangers with you. It also depends on which ride operator you get, sometimes on slides with a minimum capacity of 2, maximum of 4, they let couples go as a 2 on their own (I'm assuming due to Covid reasons) however some other operators will put 2 couples together to fill the raft. Going with odd numbers can be awkward and cost more time at the top waiting for people to go with you. The ideal party size is a multiple of 4, failing that any even numbered party size is next best, and any odd numbers or people going on their own is a bit more awkward, but you'll still be fine either way. Just have to wait to the side for a bit as they find a group to fill the raft with you.

It is expected but to be honest when they get wet you can pull them down. It is bit of downside but people don’t socially distance in line so I would advise wearing it.

If you are wondering if the park is open in October 2021, then the answer is yes. But, as always this may change due to the local restrictions to combat the pandemic. As of this week, it is currently open.