After the boat ride, we bought fish food for THB10. Alyannah enjoyed feeding them because they were scrambling for the pellets and some of the fish would even jump from the water.
From the Floating Market, we drove around the park. Sorry I won't be able to give the names of the monuments because the info on their website is not complete. I can't understand the map either.
Muang Boran is a nice place to take pictures. Be prepared to be exposed under the sun though and for a lot of walking. If you really want to look at all the monuments and replicas one by one, then allot half a day for your trip. It only took us a couple of hours because we just drove through some of the areas, stopping only at the ones that we thought were picture worthy. Hehe!