hello all. i am new to this site and oliver and s patterns. they all look amazing. but since my time is limited, can't try them all. i am looking for a pants pattern for my 5 year old boy. he is the kind of kid who only wears pants with elastic and i want to sew him a few for winter. looking for a pattern that will work well with fleece and sweatshirt fabric (not sure what is the actual name for this fabric). i guess i'm looking for something that will look like the fleece pants that are sold during the winter at old navy, children's place and similar. is there an oliver +s pattern that will work for me? thank you so much for any help directing me to the right pattern.Elana