I'm making a park and I just want to know how to cut the wood without it getting a lot of splinters on the side and it being perfectly cut. I am going to use 1/2 inch thick birch plywood and I'm just going to start building. Kerry's cuts looked so perfect on his park and the plywood looked so even on top of each other. What should I use to glue the wood together. Wood glue? Any help or suggestions will be greatly appreciated.

Basically a sharp blade, cut slow and sand it smooth. If you are asking how to cut straigh lines all you need to do it draw everything first with a straight edge.
Wood glue will work well or you could nail together with finishing nails if you drill first. Hope this helps.

Also this could have probably been posted in the quick questions thread.