Vary by store. During holiday crunch times, evenings and weekends are the norm.
Median pay range:
$8.28 to $21.19 per hour.
On-the-job training to glean sales techniques is standard fare. Smooth public speaking and communication skills and an outgoing personality will serve you well. This is a performance in many ways, so you'll want to channel your inner entertainer. Humor and friendly chit-chat attracts customers.
Past jobs in retail, sales or customer service make it easier, but any volunteering or public speaking experience is worth noting on your resume.
If you know a shop or even a big-box store near you that uses demonstrators, stop by and ask if the store does the hiring directly. If so, put in your application.
You might also ask an in-store demonstrator during a break how he or she got the job. Some companies pay a kickback for bringing in a new worker. If the store uses an outside agency, get the contact information. If you're interested in a specific product, go to the company website to check for openings and apply online. Kiosk operators in malls sometimes hire part-time product demo help. Pump it up.