Start by cleaning the plastic bunnies to remove any dust or residue.

In a bowl, mix acrylic paint with baking soda. The ratio should be approximately 1 part paint to 1 part baking soda. This will create a thick, textured paint that mimics the look of stone.

Using a paintbrush, apply the mixture to the plastic bunnies. Use dabbing motions to create texture, and ensure the entire surface is covered.

Allow the paint to dry completely. This may take a few hours depending on the thickness of the application.
Once dry, apply a second coat if desired to enhance the texture and coverage.
Optional: Finish with a sealer spray to protect the paint from the elements, especially if the bunnies will be outdoors.
Let the sealer dry completely before placing the bunnies in your desired location.