First birthdays are more for the adults than the kids. As far as the kids are concerned it's just one big play date. I have had two first birthday parties (one for each of my daughters). My family feels the need to throw a huge party for everything so I am no stranger to party planning. We have a big family so a huge party is pretty much unavoidable.
Depending on the time of day you are having your party and the amount of guests you will have the food can vary. The easiest things are pot luck type dishes. Pasta salad, potato salad, green beans, veggie trays, chips with dip, cracker and cheese platters etc etc. For ours we had an actual meal. But my family can get crazy when it comes to a party. We had the normal cheese and crackers, chips, and veggies but then we also made grilled chicken, pasta, green beans, salad, italian sausage w/peppers and onions, and dinner rolls. Then some people brought other things...my fave was the ramen noodle salad. I don't know what it's called but it's really good and most women love it because it's light. We then had an assortment of cookies, brownies and other deserts ON TOP OF the b-day cake.
Like I said...we throw big parties. We are crazy Italians so everything revolves around food! But I was fortunate enough to have a lot of wonderful aunts and cousins to help me.
I had a pinata but there were much older kids at my parties. A really fun idea is to get small pumpkins and acrylic paint and have the kids paint their own pumpkin. The little ones can have mommy and daddy help out. It's a cute fun craft and that can be their party favor. Something like that can get all of the kiddies involved at the same time.
If you decide on a gift bag keep it simple. It's really easy to go nuts when you aren't really sure what to give out. If you are going with a theme like disney for instance, you can give out disney coloring books and crayons to the older bunch and maybe a little disney ball for the younger kids (I found some at Walmart for around $1 last year). Seeing that the oldest will be about three you could probably get away with giving a ball to all of the kids. I gave out a ball and a rubber duckie to the little ones and did crayons and books for the next age up and for the oldest crowd (7-9) I gave out note books and fun pencils. Then I threw in some small goodies for the 5 and up crowd like rings, little cars and the such. That seemed to keep them all pretty happy for the rest of the day. I also had them do little scavenger hunt to find their bag.
There was a smash cake for the b-day girl which is always themain attraction and then I sat with her on a blanket to open gifts.
The most important thing to remember is to keep everything as easy as possible for yourself. If someone asks if you need help...PUT THEM TO WORK. If you would rather order a few pizzas and have a veggie tray DO IT!
This day is all about your pride and joy. You should enjoy it as much as she does...after all you are the one who will actually remember it.
So take lots of pictures and have lots of fun...you may want to designate a friend or relative to take pics for you.
Have fun and congratualtions mom!