I use to be able to get to Google Code Playground page.
As discussed in A guide to Google Code PlayGround
Its a web-based tool that lets web developers try out all of the APIs that Google provides, tweak the code, and see the results, I found it very useful.
But now when I try, I get redirected to API Explorer!
Has anyone got any ideas why?
Thanks in advance.
I don't know why they changed it, but probably you will need to go to the specific API/product you're looking for and search there.
For example, I used to teach the Visualization APIs with the playground, but these seem to have been reclassified as a chart "product" with the interactive code editing now hosted through JSFiddle:
https://google-developers.appspot.com/chart/interactive/docs/gallery
Good luck (re)locating what you're looking for.