These are real pumpkins..but you could use fake ones too. Simple cut off the stems of the bottom and middle pumpkins to make them flat and easier to stack one on top of each other. Add a little hot glue to keep them from rocking and rolling.
I used this plastic urn that I bought from Lowes to hold the topiary.

The urn was originally a cream color but I spray painted it black.

BETTER HOMES AND GARDENS have these adorable pumpkin topiary ideas below.

I love this idea of using a pole to separate the layers.

Here are some funny carved pumpkins stacked on top of each other to make a fun topiary.
I would imagine you would have to put a pole down through all of these pumpkins to make it sturdy enough not to fall down. I love love this idea!

You can hang a few from a chandelier to make it look really special....

Use can use some to decorate a present for a friend....

Tie a ribbon around a napkin with a napkin ring attached for a festive new look....

Finally use them as a napkin ring or gather a bunch and ring them around a large candle....

What uses have you found for your napkin rings lately?......
Link up to Centerpiece Wednesday below