1. Duplicate the egg sprite and decorate by editing the costume (using vector mode) 2. Add an effect by adding code to the "When this sprite is clicked" event block (Looks, Motion, Sounds) 3. Create a new Stage background and decorate (Happy Easter) 4. Add an action to the Easter Bunny
See sample https://scratch.mit.edu/projects/54625184/ Bunny from OpenClipart.org I made the egg :)