Add some legs to the bucket. Make sure the motor is at least 6 inches or so off the ground; the short legs on mine make the motor sit in the seeds and...
This bucket thresher is a small version of my bigger seed threshers for breaking the seeds out of dry seed heads of wildflowers. Using an old blender motor, and five or three gallon bucket with lid, plus a few other materials, this can be put together pretty quickly.
Step 1: Mark and cut the bucket
Use a small plastic flower pot (this becomes a dust cover for the motor) as a guide for making a circle on the bottom of the bucket in the center. Then mark for three holes around the circle (see the picture.) Cut out the three holes; tin snips work well for this.