For Math Category;
From Cite Science Center:
> https://www.cite-sciences.fr/en/explore/permanent-exhibitions/explora/mathematics-1
> https://www.cite-sciences.fr/apps/mathematiques/generale/english/index.php

From Brilliant: www.brilliant.org
From PhET: https://phet.colorado.edu

For Science Category;
From Cite Science Center:
> https://www.cite-sciences.fr/en/explore/permanent-exhibitions
> https://www.cite-sciences.fr/apps/generales.php?L=en

From Brilliant: www.brilliant.org
From PhET: https://phet.colorado.edu

For Coding Category:
www.codementum.com