Nothing ties in with anything my baby does date wise and then the book caveats it by stating the leaps can pretty much happen at any time. So really it's just a general development book listing the things babies do in chronological order and nothing new.
Also it seems to be telling me that at her current leap 'relationships' she could possibly be standing up on her own and walking. She is only 6 months. She's just about learning to sit. Am very confused....