Before I got duck clips I used to use bobby pins for root volume. I also think it's a great way for even when you are out. You can hide bobby pins very easily unlike duck clips. One time, I bobby pinned my bangs to the side of my hair while in the drying process and it made my hair very volumized. I think the best way to use bobby pins is by making sure you get as close to the root as possible. Try different methods and see what works for you.
CG, High Porosity, Fine, Low Density, Medium Elasticity
Suave, V05, GF Go clean gel, ACV rinses, CO, and Gelatine PT.