You cant go wrong with classic cream buttons! I used the Handmade with Love set to embellish my daughters Easter dress. The pattern the Harper dress by Made for Mermaids. The peter pan collar is perfect for highlighting the button center. The fabric is Spring Hare by Lewis & Irene.
The dress pattern is very versatile and for me an easy sew without the pin-tucks. The skirt has mega twirl potential ( totally important! ) and there are lots of ways to dress it up with buttons and trim.