Glad it worked for you, Dale. I’m sure you are giving those decoys food and water so they stay alive as long as possible in the trap.
It takes some patience to teach bluebirds to take your live mealworms. But if they have babies it should be easier. You have to just keep putting them out where they perch. Put them in a clear or white shallow ceramic or glass dish (smooth sided so the mealworms can’t escape). Put it low like on a step stool or plant stand and right under where they perch. Sometimes it takes a couple of weeks of doing that.