Check out info on resin casting. You have a mold, mix the resin with a catalyst. Whatever is in the mold gets embedded in plastic. - This link doesn't include info, but it's a reminder to go check out more info on resin casting
DIY blooming monogram perfect for wedding decor. Use silk or dried flowers in florist foam in the hollowed out craft letter. You also could make wine cork letters or use other decorative items to create a meaningful monogram for the happy couple.