We are doing a Halloween activity and I will have an image of a jar and invitees will guess how many are in the jar. I'm trying to figure out how to do a poll like that if possible.
We have no specific poll type for an activity like this and no automatic winner selection. But I think you can workaround this with a PollUnit survey.
You click »Create PollUnit« and choose »Survey«. Now you are in the Survey Maker. In the first step you can add a title and welcome your participants and add some information. In step two you can add steps to your survey. So click »Add step« and choose »Query information«. Now you are in the step modal. Here you can enter a title and description for this step. In the description you can add your image of the jar. Click »Next« and add a field of the type »Number« and name it. Click »Save« and you are ready to go.
For finding the winner you need to export the data as excel. You can sort participants (rows) by the number field column. Then you should be able to easily find the person with the best guess.
You can also collect participant information in the survey to inform the winner.