G.M.
Hi J.,
For a one year old, there aren't many places around that I know of for kids that age. I would suggest seeing if someone in your party has a big enough backyard to may be do the party there so that it can accommodate everyone.
I would suggest Bounce World, but older kids go there as well, and the wee ones will definitely get tripped over.
I had my son's party here at the house, and only invited a small amount of people. I have a small house, so not really enough room to have a lot of people over.
I would suggest Busy Bodies Planned Play, but they are expensive.
May be at the ZOO in the am? Say for instance, the Wild Life World Zoo? With their new Aquarium, the kiddos would sure love it. Then of course, you'll have to worry that everyone can afford their own way. With this all said, I would definitely see if someone has a big enough backyard for an am party. I wish I could be of more help to you. Hope this helps though. :-)