Traveling with a baby on a long flight can be challenging, but with some planning, you can keep your little one engaged and comfortable. Here are some activities you can do with your baby on a long flight:

1. Bring their favorite Peariwinkle Toys: No better place for them to work on their development than a long flight! Pack a few of your baby's favorite toys to keep them engaged and provide a sense of familiarity. 

2. Board Books: Bring along some board books with real life pictures and textures. Reading together can be a calming and engaging activity for your baby.

3. Create a sensory bag filled with soft fabrics, crinkly paper, or textured objects. Your baby can explore the different textures and sensations while keeping them occupied.

4. Sing and Play Music: Sing lullabies or play gentle music that your baby enjoys. Music can be soothing and entertaining during the flight.

5. Snacks and Finger Foods: Pack some baby-friendly snacks and finger foods that are easy to handle and not too messy. This can help keep your baby occupied and satisfied during the flight.

6. Play Peek-a-Boo: Engage in simple interactive games like peek-a-boo or pat-a-cake. These games stimulate your baby's social and cognitive development and can be played using your hands or with small toys.

7. Let them look outside the window and see the world around them. No better place to explore than up in the clouds, which can be a stimulating and fascinating experience for your little one who is trying to understand the world they live in.
8. Walk and Explore: When it's safe to do so, take your baby for short walks up and down the aisle to stretch their legs and provide a change of scenery. This can help them burn off some energy and alleviate restlessness.

Remember to be mindful of other passengers and respect their space and comfort. Be prepared with extra diapers, wipes, and a change of clothes in case of any accidents. Most importantly, stay calm, patient, and responsive to your baby's needs throughout the flight.