Here is a pair of shorts I made this summer for my 2 little boys. My baby wears his all the time, and my 2 (now 3) year old prefers his "sports" outfits like his two older brothers. Give them tennis shows, and you know what they are wearing nearly every day :)
I love this fit on a little baby! Can be boy or girl in my opinion. Just use the fabric you like.
This next outfit is an outfit I made for my sisters new baby boy.
(I doubled it up and also made it for a friends new baby, as they were born close together)
I love the look of the finished results of these sweatpants, although a bit time consuming, But for a gift, all I have is time :)
Have a good day!