From wavesandwild.com:
The Child Sundowner Sweatshirt is a relaxed fit, hemmed raglan sweatshirt with curved seams and a hi-lo hem.
This pattern goes from Prem./Small Newborn all the way up to Age 12.
Add pockets or piping. You can also try a drawstring hood and/or hemline on the older ages.
An overlocker/serger will create the neatest finish but importantly, a sewing machine is all you need for all options.
Fabrics such as lightweight sweatshirting or French terry are perfect for the Child Sundowner Sweatshirt. However, you can use any light/medium weight stretch fabric.