My daughter has been trying to hold her head up to every since she's been born. I think I might start at 2 weeks as well. @kimlove
I started with my daughter at like 2 weeks, but she's been holding her head since she popped out of me so I felt like it was appropriate. She still gets fussy after like 5 minutes on the playmat so we sometimes we just do it with her on my chest.
as long as its supervised i say do it. my son been holding his head up since like 2 weeks and it shocked me. these babies r fast. @margie_boop