Make a hole in your top hat base and cover the whole with hot glue.
Add hot glue to the whole in your skeleton's head, insert a floral pick/stem and add the tophat onto it.
Add a zip tie end in your skeleton's wrist to control the range of motion. Secure with hot glue.
Add hot glue to some of his joints and hold them in the position you want it in. This works for his jaw, elbows, etc.
Make a large terry bow using 7 different ribbons.
Fluff out your bow.
Add your terry bow on the right of the skeleton and secure it with wire.
Add some black leaves in where the twist ties are. Secure them with hot glue.
Place a pumpkin on the skeleton's hand, securing it with hot glue and a floral pin.
Hot glue a spider onto the pumpkin.
Fill in and around your bow with long thin leaves and any other small decorations that you like, making sure to not obstruct his face. Secure then with hot glue.
Add a simple bow to the skeleton's neck.