Go to your Contest Builder tab in Salesforce. Once there, click Build New Contest.
Next, choose to build a Contest from scratch. You will then choose between a Single or Parent-Child Contest.
For this example, we will choose to build a Parent-Child. You will have many of the same steps as a Single Contest.
You will fill in the Overview tab first, then Participants & Observers. Participants are selected here and will remain the same for all of the Child Contests.
The next tab is the Child Contests tab. When you are ready, click add new Contest.
You will then be able to create a Child contest. Follow the steps and create as many Children as you need to. Your start and end time can be different from the Parent, but the Child start and end MUST be within the duration of the Parent.
Once you have the Children contests completed, just add prizes and notifications (if any). These can be different for all Children/Parent. When you are ready to launch, you can launch everything at once or one contest at a time. Just click view Parent Contest, and then go to the Child Contests tab.
Here, you will be able to launch all Child Contests in the bottom left or click launch next to each Child to launch the individual Contests when ready! Good luck!