+If you are using a different Arvados instance replace @{{ site.arvados_workbench_host }}@ with your private instance in all of the examples in this guide.
+
+h2. Playground
+
+Curii operates a public demonstration instance of Arvados called the Arvados Playground, which can be found at <a href="https://playground.arvados.org" target="_blank">https://playground.arvados.org</a> . Some examples in this guide involve getting data from the Playground instance.
+
+h2. Logging in