1.
Official site of group "Child and computer" Official site of group "Child and computer"
http://kidandcomp.narod.ru/ - Lviv
Official site of group "Child and computer".
2.
Book "Thoughts country" Book "Thoughts country"
http://mysl.lviv.ua/ - Lviv
Book "Thoughts country": sums and tasks for children.
3.
Сайт abc-color.com
http://abc-color.com/ - Lviv
4.
5.