You will need only two items beyond your imagination.
For this project you will need a bird nest and a feathered craft bird
A used bird nest can be found abandoned in many small trees once the leaves fall, often they can be found in eves and hedges as well. Make sure it is too late in the season to be required by birds. Most birds make new nests each year to have their young then abandon the nest, although some birds will use previously made nests. Please don’t take the last one from an area; you would not want to discourage birds from breading nearby. Best location is to find an area that is being developed for road widening, commercial use or new subdivision, as trees etc will all be removed anyway.
The bird or birds can usually be found in craft shops and dollar stores. Choose the bird to match the nest, small nest small bird etc. The bird I use made of red, white and dark green feathers to reflect the seasonal colours.