I am coaching a group of 15/16 year olds and I have had them running around doing preseason for the last couple of months. We started in the gym and did a lot of sprints, agility work and strength training before moving everything out to the oval and introducing balls. As it turns out, the start of the season has been delayed and I need to change things up to keep them interested and keep them keen to come out at the start of the season and rip their opponents to shreds. Has anyone got any ideas for any unique and useful activities we could do, or any general ideas for helping kids this age to reach their potential?