One of my favourite tools.

As noted, use the Nightly builds from: https://openscad.org/downloads.html#snapshots

When working with kids, it's well worth keeping: https://www.blockscad3d.com/editor/ in mind, or for folks who like to draw connections: https://github.com/derkork/openscad-graph-editor

Eventually, someone will note that its programming model limits variables and so forth --- for folks who want a more traditional language choice there are a number of options, notably for Python:

https://pythonscad.org/