This is what I did with the bottom part of the onsie. It's just a diaper cover- but so easy to make. These would have been super handy if Mike and I hadn't gotten air conditioning this year. Last year, when it would get up past 80 degrees in the house, I would just have Mim hanging out in her diaper. That wouldn't have worked this year- if the velcro tabs aren't covered, she loves pulling on them and subsequently taking off her diaper, which I don't love. At all. So here's how it goes:
You cut off the snaps from your bottom onsie piece.
Then you pin right sides together and straight stitch, leaving about a quarter inch seam. I used 3/4 inch elastic for the top- I made a casing, leaving a gap before I went all the way around to insert my elastic. I threaded the elastic in, sewed it together, then closed the casing. That was it. I also added some contrast stitching along the leg holes. There you go:
My original plan with the white ones was to sew a fly on them to make them look like little boy undies, but I thought I'd take the pictures before I attempt that. Wouldn't that be cute, though? A little one year old running around in what appears to be big boy undies? I think I'll finish the white ones like that and send them to my nephew in Philadelphia. The possibilities don't stop there, though- you could put ruffles on them and instead of a ruffle bum onsie (which are so popular right now), you'd just have a ruffle bum! Or you could do a little bum applique, or ruffles around the leg holes, or...anything! I'm glad I have so many onsie bottoms to experiment with.
It almost makes me wish we didn't have air conditioning, so Mim could just be running around in these when we're home. I suppose I'll just have to plan on them being under dresses and then count on Mim lifting her dress up to show people her "eek" (bellybutton). Fun fact about bellybuttons: if you undo yours, your butt will not, in fact, fall off. That's what we told my little brother for years. Update:
Here they are with boy underpants lines on them. I'll probably go over them a few more times to make them more obvious before I send them to my nephew, but I think they're hilarious.