Assuming you are asking about activities to do with a 3 month old baby, here are some ideas:
-Start reading to your baby! This is a great way to bond and introduce them to language and literacy. It's never too early to start!
-Get down on the floor and play with your baby. Tummy time is important for developing their muscles, and playing with them while they're on their tummy can help make it more enjoyable for them. Try using toys that encourage them to reach or kick, such as hanging mobiles or suspended toys.
-Start teaching your baby simple songs and nursery rhymes. This is another great way to bond while also introducing them to music and helping develop their memory skills.
-Encourage your baby to start grasping objects. This helps with their fine motor development. Offer them different textures of things to hold, such as soft stuffed animals, hard blocks, or even items from around the house like keys or remote controls (supervised of course!).