find some appropriate awards and have fun making them.
talk to parents and see what other coaches are doing about this sort of thing. there are usually a couple of options that you can look at and see what is going to make the biggest difference for what you feel that your team is going to need and how you want to get things done with them. see what you can find and sort out what is going to matter most, and then help your kids to really enjoy everything that comes with little league by finding the right rewards for them to have and enjoy together in the long run 