The kids are separated into 2 teams, best with 3-4 persons per team. Each team is placed in one end of the gym, so that they have a long run. You need 2x 3 identical things (f.x. 3 gloves and 3 balls).
Place 3 items (not identical) in front of each team. One player at a time from each team now runs down and get one item from the opposite teams. The game is about getting 3 items and preventing the opposite team from getting 3 identical things.
Only one item can be carried at a time by each team, and you are not allowed to hold on to the items in front of your team.