You can secure eggs to the wreath with floral wire. Glue works well to secure the eggs because they don’t lie flat.
If you’ve got a steady hand for lettering, you can paint on the letters of ‘Happy Easter’. These were cut out on sticky PVC using a blade-cutting machine.
Before or after painting the eggs, you can fill the holes with wood filler. Leave the wood filler to dry then paint over those filled areas.