If they’re wood, you could try some tough dental floss to get behind them and break them away from the box itself without causing cosmetic damage
@Donna Woods ah I didn’t think of dental floss! I will give that a try thanks 🙏🏼
Are they stickers or glued wooden shapes? If stickers, heat usually softens the glue. If wood, I’d guess you’ll have to pry the letters off, sand the box and repaint..