What are some ideas of celebrating LO's 1st bday?

I'd take baby to the zoo! At this age, a fascinating place like the zoo would be awesome. I'd plan a half day at the zoo and pack some finger foods and invite close family and friends. We can have a mini "picnic" and learn about the animals at the same time. If outdoors are not something you'd consider, a day at the baby gym is good too. You can pack a simple cake and some goodie bags for baby's "friends" and celebrate there. I've been to one of those and it was so much fun!