You need to sign in to do that
Don't have an account?

Build a Battle Station App - Adding resources and supplies records
On https://developer.salesforce.com/trailhead/project/workshop-battle-station/battle-station-3 it says I should add resources and supplies records. But where do I do it? Don't I need to create custom tabs first? I haven't seen it mentioned in the previous steps.

You will first create the battle station, then under the related list for the battle station, create the resources and supplies. You don't need a tab to do that since you are creating it from it's parent record.