What's a good way to inexpensively add some whimsy to my flower bed?

Maybe an old bowling ball (thrift store) spraypainted in a bright color or painted like a lady bug?

Use things from around your house that you can use to set containers on. I have a buggy wagon seat in my garden and I have a large container full of different flowers in it along with a percollater coffee pot that has flowers in it too.. I have received a ton of compliments..

An estate auction is a great place to purchase whimsical items. There are always lots of odds and ends to be purchased for under $5.

Old chairs into planters.old bowling balls painted,wind chimes out of old silver ware or cds.

Make some fake flowers that will spin with the wind. They can be made with plastic soda bottles.

Add in some yard art! Small shepherd's hook with something colorful hanging from it.