Regardless of what the company says, the Fun is more playboat than river runner, with all of the pros and cons that go with that. It will get slapped around when running a rapid, and the edges WILL catch on crosscurrents. It's probably forgiving compared to a dedicated playboat, but your kid will have to learn to mind his/her edges and keep an active blade in the water. My son had fun and learned a lot in this boat, but he was very happy when he got big enough to switch to a Remix 47.
I'll echo the other reviewer's complaint about the rope/cleat back band setup. It's very hard to secure properly, even with adult strength and coordination.
The more recent version of the Fun 1 has a redesigned seat back that is problematic. The manufacturer replaced the ratchet clasp on the seat back (which was an excellent design) with a cord-and-cleat arrangement. Every time our 5-year-old kayaker paddles the boat, the cords pull out of the cleat; this abruptly releases the seatback and allows it to slide rearward into a useless position. I am sure that the manufacturer believed that the new design would be an improvement since it does allow the paddler to quickly adjust the seatback. However, because the cord tends to release and slide back at inopportune times, it is a constant hassle and a safety issue. The older ratchet clasp design was clear1y superior, in my opinion.
The Fun 1 is still an excellent kayak for young kids; however, I would advise buyers to look for an older used boat that has the ratchet clasp on the seatback.
I would now give the Jackson Fun 1 kayak an 8.0 for the boat itself, but because I got a total cold shoulder from the company when I tried to address my concerns to them, I am lowering my rating by one additional point for poor customer service. I now give the Jackson Fun 1 an overall rating of 7.0.