I like the tree w the purple crystals in it, you could do your colors with the pretty beaded garland they have now.
purple ribbon backdrop: 8' x 8' ribbon backdrop in shades of purple. also available to rent is a low profile aluminum frame if you don't have an area to hang this from.
Purple and silver balloons from a Personalised Champagne bottle base
Little Big Company | The Blog: Very Pretty and Creative Purple First Birthday by Jackie from Jack and Kate
PURPLE OMBRE CAKE... for Georgia's "Justin Beiber" purple party
5 Tissue Paper Poms in Purple Party - Sophia the First Birthday Party Inspiration
Chocolate Covered Pretzel Rods are a delicious diy treat. They are also great as party food and can be customized to fit the party theme. These white and purple pretzel rods can symbolize princess wands at a Sofia the First party or princess party. - Gator Mommy Reviews
Mermaid cake pop (can be for a boy if you change the color of the sprinkles)