Improvise and adapt
Improvise and adapts the games and exercises in the games in this site. Perhaps change rules or elements in the games. Much depends on the kids you are training. Use your imagination. If you do not have the usual items used in the exercise, perhaps something else can be used.
Even the most funny game dies at a time, even if the kids can play the same game often for a long time without the variation adults would require. Be aware of when the game or exercise stops being fun, and at all time has another game ready.