Martha Brae with almost 4 year old?

Hi all, was wondering if anyone has an idea of whether the Bamboo Rafting on the Martha Brae would be a good idea for an almost 4 year old? We will be a party of 4 total and based on some of the pics it looks like there is only 2 seats to sit on but the raft would accommodate?

He isn't a swimmer just yet so not sure if advisable to do this one.

Any suggestions appreciated.

Should be fine, but I'd put him in a life jacket for sure. With four of you it will be two per raft. Very calm and relaxing, but you just don't want to take chances.