1. DIY Glittery Geodes
2. Fabric Patterned Wall Letters
These are super easy to make, and don't cost a penny if you already have fabric and cardboard boxes lying around. You can do a lot with them by adding buttons, lace, or fabric flowers. They are also completely no-sew.
You can also opt for hot-gluing fake flowers all over a cardboard letter to have a lovely flowery monogram.