Siri has a few extremely scientific and mathematical costume suggestions for Saturday’s festivities, but good luck figuring out how to implement most of them.

You can get prompts from Apple’s digital assistant by asking, “What should I be for Halloween?” to your favorite iOS device. Siri’s ideas aren’t bad if you can find a way to make them work. Check out a few of them below, which we captured from an Apple Watch.

So a good Halloween costume idea is not coming to you. Steve and Marianne Wintercroft can get you started with an alluring mask.

The British design couple has made a company out of designing masks that the buyers build themselves. For a few bucks, you can download a template of a polygon constructed animal head that you print, cut and assemble.