Survey Tool

Hello dear community,

I'm looking for website a tool with which I can create an online vote for students.

The point is that we are organizing a contest in which 6 groups participate in the final but there are 12 participants, now people should decide online which of the groups should participate in the finals.

I would like to show 12 pictures of the group and the participants should be able to vote with a click on the picture or a button near the picture vote, is there such a ready-made tool that costs idealer free or only a small amount? Thanks in advance!

Best Regards,
Terry Stone