Good to know for the future :) Be wary of how you talk to your older child. Saying things like "I can't right now, I'm feeding the baby" or "Please be quiet, the baby is sleeping" may lead them to resent your newborn. Rephrase them saying something like "Go grab a book and I will read to you while we feed the baby" involving your older child in the process will save some grief.
How to Discipline a Toddler Who Deliberately Disobeys
Great gift for the older sibling of a new baby -- "Happy Big Sister Day!" I've seen this before, but I like the addition of a camera for them to take their own pictures, assuming they are old enough to get it. If a toddler, perhaps a toy camera