Choose simple hand or finger puppets with bright colors, high contrast, and soft textures, since babies respond most strongly to bold visuals and safe materials they might also want to touch or mouth. Keep the puppet close to your baby's face, within their focal range of about eight to twelve inches, since babies cannot see clearly at longer distances and need the puppet nearby to track it with their eyes. Move the puppet slowly and exaggerate simple actions like waving, bouncing, or peeking, since slow, clear movements are easier for a baby's developing vision to follow than quick or subtle ones. Use a varied, expressive voice for the puppet, with sing-song tones or funny sounds, since babies are drawn to vocal variety long before they understand the words themselves. Keep each little scene or song short, just a minute or two at a time, since babies have very short attention spans and will lose interest quickly even if they are enjoying it. Watch your baby's reactions and follow their lead, repeating parts that make them smile or laugh and moving on when they look away or seem done, since babies communicate interest and disinterest clearly through body language.