Many thanks for your advice, will try Smalltalk.
Lumi Rasidescu
1

By the way, should you decide to go with Squeak instead of Pharo, Stéphane Ducasse has written a good book for teaching programming to children using the theme of robots. It should make it fun for them! Here’s the downloadable book: https://gforge.inria.fr/frs/download.php/10764/BotsInc-OriginalEnglish.pdf