Prepare a baking sheet by lining it with parchment paper. Set aside.
In a small bowl, melt 4 oz of white bark in 30-second intervals, stirring often.
Put a small amount of melted chocolate on the end of each stick and push them into the cream filling of each Oreo. Allow to harden.
Dip 6 of the Oreos into the white melted bark, covering them completely.
Place them on your prepared baking sheet and add sprinkles.
Melt an additional 4 oz of bark like you did the first batch. Stir in a small amount of blue food coloring gel to create a pastel blue. The amount you use will vary depending on the type of food coloring you are using.
Dip 6 Oreos into the blue, completely covering them. Place them on the parchment paper and add sprinkles.
Continue this with the green, pink, yellow, and purple.
Chill for 20 minutes or until bark is hardened.