Mending, making, and sewing up rips

I read somewhere online:  "I can embroider, cross-stitch, use a sewing machine, and sew by hand to alter clothes.  If my clothes rip in a way I deem unsuitable, I can mend them.  Sewing is an art fewer people learn every year."

Once upon a time, I made my children's clothes and could do all the things that person listed.  One of my daughters wanted my sewing machine, so I haven't been doing much sewing lately.  Now I wonder how many people still know how to mend clothes.  Do you?  And do you make clothes for your children?  Or did you, when your children still lived with you?