For many young players, this will be their first experience with fundraising ideas for soccer. Young children don't always completely understand what fundraising for soccer is about, or why they have to do it. For them, the uniforms and equipment just appear as if by magic, they don't really think of it in terms of money that needs to be raised. This is a great time to get them together and explain where some of the money comes from, and that their cool uniforms are made possible by the fundraising for soccer efforts they put forward. If they can make a direct connection in their heads between fundraising and things that benefit them directly, they're a lot more likely to put their best effort into it and try to do the best they can with their fundraising for soccer.
You can also use fundraising for soccer to teach that teamwork is something that happens both during the game and after, as well. Most of them are starting to understand that they have to work together to win a game, but fundraising for soccer can help form in their minds the idea that teamwork is so much more than what happens in the context of a game. When you get them fired up about their fundraising for soccer effort, they can learn to use their energy to help themselves and each other reach their goals.