For those travelling with their babies, here's a few tips I've learned when I travelled with my 4 months old son:
1. Bring a photocopy of his Birth Certificate, just to be on the safe side. I had a cousin who was stopped by the Immigration and had to show her IDs, etc. just to prove na sila parents, lalo na if going abroad.
2. Just bring your diaper bag with you. It should have 2 sets of clothes, in case of emergencies, wipes, diaper, pacifier, milk ni baby (depending on how long the flight is). Kapag landing and take-off, try to feed the baby or use his pacifier. yung favorite toy din niya, just to entertain him during the flight.
3. Sa luggage naman, eto lesson learned, don't bring too many baby clothes, my baby ended up not using everything I brought with me.Sa diapers, just bring the small pack, and buy na lang there. Same goes with the water, wipes or anything which can be bought there naman.
4. About the memories naman, obviously the younger they are, they wouldn't remember a thing. Tama sabi ni sis na you could show pictures naman when they are older na.
5. Prepare to be verrry tired. Especially, if your little one needs to be carried around pa. Also, I suggest that you should bring his stroller. Although hassle sa byahe, but you will be thankful kapag you don't have to carry the baby all the time. Kasi kami, iniwan ni hubby yung stroller, ayun we have to carry him lage, kahit tulog sa mga kainan nakakarga pa kasi nga walang mapag-lagyan.
Good luck mga mommies and have a safe and fun trip.