Split your class into groups, set up a few small activities (some ideas below) and give them an amount of time on each activity...
Running races (no equipment needed) - hopping, skipping, jumping over 'obstacles', etc
Target practice - either a ball into a hoop or target nets/bean bags
'Statues' - move to the music, stop when it does - either give a movement or free choice
Skipping
Pass the ball down the line - under/over, side to side - race?
Ummm... I gotta go to work now.
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A clever person solves a problem.
A wise person avoids it.