ToeBee
Sure. If you just click on the "Edit" button up at the top of this page, it will start up a map editor right in your browser. It has a brief tutorial that will show you how to add data to the map. Run through that and see if it makes sense. You can draw an outline around the building that the community center is in and then label it as a community center and give it a name. You can also draw an area around the dog park and label it as a dog park. Feel free to comment here if you have any questions about the process!