The sleeper is one that still fits my dd it is size 9 months and she is 15 months old but only 18 pounds. The sweater is about 3 inches longer than the sleeper.
I cut off the arms and used a sleeper as a guide for the crotch. I used the waist of sweater to make the leg cuff.
I cut off the end of the arms (used the sleeper for the size measurement).
I cut the shoulder on the sweater down to the size the sleeper was. I did take the neck in a tiny bit (my dd has a large head). I want to learn how to use my serger so my stitches might not look nice I am still learning how it works. A sewing machine would have worked.
I surged the along the open legs to keep it from fraying The only spot I attached the front to back in the legs was the bottom cuffs. I can get my dd in and out to put on potty or diaper change easy with the cuffs together. 
I turned in the serged edges (enough to stick the snaps in 2 layers.) I added snaps to close the legs. I turned up the cuffs on the wrist and ankles (until my dd grows some). I am sorry my pictures are so dark. It was dark and raining when I did this. My dd was taking a nap not far from me so I didn't turn on the lights. I used the flash but the pictures still look kind of dark.It looks a little boyish to me but it will work great when winter hits. The floors in our house are always cold.

The short in the picture above is one I made up the same way I did the orange, green, and off white shorts. I just skipped every other or every third stitch (not sure I didn't write it down) to bring in the top. I like look with the front tie so if I do ever use this pair of shorts I might add in the tie just for looks. My DD is very thin she might need the tie to help keep them up.
This pair I did in half double crochet. Same pattern just less rows. I made it to the same length as the others.
This one took the longest but was the most FUN to make. I finished it up last night. I used all my last bits of yarn in a random order. I used a half double crochet stitch and make it the same as all the others. Above is the front view. Below is the back view. I added some green fringe trim and a peace sign. I think it looks better in person than in the picture. I think it looks FUN.... I haven't showed it to my DH yet. I have a feeling he won't like it at all. It isn't his style.











The one below is NOT the same shorts above but it was made with the same pattern. I felted this one. It still fits my almost 15 month old DD. I should tell you she is very small for her age. She just hit 18 pounds. She is in the bottom 5th percentile for her age. It is getting a little low in the rise. If I felt another for her I would add another 5 row stripe first. She is very thin if she was a chunky baby like my son was I would have to add a lot of stitches to make it wider.









Sew up crotch from back of leg hole to front on both sides.








The ice blue raspberry lemonade didn't turn out the color I wanted. I put about 10 drops of blue food color in a dish with 1/2 cup vinegar to try to get the color I wanted.
This is how they turned out. The darker blue is the one made with food coloring. I ended up adding some red food coloring into the grape koolaid dish. It was more blue than purple so 2 drops of red gave it more of a purple color. The food coloring was added after the first 2 minutes in the microwave.
I picked out the lemon lime, orange, and some yarn with no color to make my shorts. My first shorts (ones in my first or second post on this blog) I made with the same 3 colors and some cherry koolaid yarn.