The Socialite Skirt DIY no-zipper skirt -- I love this lady, she has so many free tutorials that are easy and yet classy and don't look DIY but professional. I already have a few of her tutorials on my To-Do list.
How to add adjustable waist elastic to kid's pants. I've done this to many jeans for my children and myself. I don't even buy buttons and elastic for this project because I remove the buttons and elastic from old jeans to re-use on current jeans.