I recently finished making her a new bubble/romper. I used Kwik Sew 3776 (as used here) as a base, but recut the front bodice and straps as one piece, and added some white piping. I sewed a bigger size too, my wee girl is now five months and growing far too quickly.
The fabric is from the gorgeous Children at Play line by Sarah Jane. I really love this line, but have to admit to not initially being too fussed over this particular print. I bought most of the collection online, but when I saw this fabric in my local fabric shop I just had to have it. The colours are fantastic.

Finished bubble - front view

Bodice detail

Back view. I used white snaps to match the piping.