TMZ filmed this video of the group, which included Kim's assistant, a nanny and Diddy's Suge Knight look-alike bodyguard. The family shopped at Lisa Kline Kids on Robertson Blvd., where the mogul dropped a cool $2,100 on his young babes, which he put on his black American Express card -- standard!

A source inside the store tells TMZ that Kim and Diddy picked out matching Juicy jumpsuits, Rachel Weissman baby hair accessories, and two Princess dining sets. The little ladies are getting an early start on their manners!

Labels: Diddy, Kim Porter