Since it's her first birthday you coould pick something you think is cute because the next birthdays she will be able to tell you what she wants. I could think of alot of cute ideas, I think farm animals would be adorable, like cupcakes that look like pigs and lambs and baby chicks :) And the cake could be a barn!
My dd will be 4 in July n ds will be 1 the same month. So I am combining their party this yr and doing a cupcake stacker. I am doing a ladybug theme for her, and dirt n worms for him : ) We are also letting the kids there (n adults too if they want) decorate a flowerpot, plant a flower in it and take it home : )