how to show child site multisite in main site per blog/subdomain

hii..i have a multisite with 7 subdomain. i use buddypress social theme. can i show content in main site per blog?
http://www.domain.com

child1.domain.com
child2.domain.com

in main site theme i want show content with grouping the content. example theme in main site:
left -> 5 new post from child1.domain.com
right -> 5 new post from child2.domain.com

thx