Shy tory factor is a phrase used to describe a situation where people are too scared to vote in an election. This is important because it can have a big impact on who wins the election - if enough people don't vote, it could change the result. To explain it to a 5 year old, it's like a game where some people are too scared to play even though they know they should, which means the people who do play are the only ones who have a say in who wins.