With the situation around the Corona-virus, and schools that get partially closed again (at least in Belgium), Is it worth to consider Open Croquet to create educational content . I read about Croquet on Squeak 5.2/5.3, but I don't know i the current version is up to 'serious experiments' already.
(I use the word serious experiments, because on our side (producing content) , 'professional is too high a level now.
I send this to the developer list, because the open croquet maillist I found has a last post in may 2012.
Kind regards,