Interactive playgrounds are inconsistent, some work, some don't, different formattings

[mrjf]

Thsi oen seems to workL https://silver-funicular-2qkwekw.pages.github.io/index-playground.html

This one has no playground: https://silver-funicular-2qkwekw.pages.github.io/value_counts.html

Others don't work at all. Some aren't linked.

Don't link explicirtly to "interfactive playground" for each item, just have the header for that item be a link to the docs / playground. It's just that every page has a playground element for every item.