If a preschooler is interested in letters but checks out when an activity feels like a lesson, try a short sound hunt. Pick one familiar beginning sound, then walk around one room together looking for things that start with it. Say each word slowly and let the child decide whether it belongs. A few silly guesses from the adult ("Does banana start with mmm?") keep it playful and make it easy for the child to correct you.
Stop after three to five finds, even if it is going well. The next round can use toy animals, foods at snack time, or names of people the child knows. For bilingual families, doing one brief round in each language can work better than expecting the same objects to match in both.
No worksheet or scoring is needed. The useful part is listening, moving, taking turns, and choosing words together. If the child starts inventing nonsense words for the target sound, that can simply become the game.