One of the big goals with Jr.FLL is providing the kids the opportunity to start learning about how to make decisions and work together within the framework of a team and the rules. When we started in Jr.FLL 4 years ago, it took my team 2 days to pick a team name and another 2 days to decide on the snack to research. Because to each of them their idea was the best. What my kids started using was a pros and cons system. For each of the items they make a T chart on a piece of paper and take turns adding what might be a pro or con to each choice. After they finished they had a visual that showed clearly where more pros or cons lay and they could see which one they should pick.
This is the perfect time for them to adopt a method to help them. My team is now in its 3rd year of FLL and the kids are still doing pros and cons, they have a whiteboard they use now.