I can't give you specific drills (I have no idea what your set-up is, what mats and space you have available, etc...) But I can hopefully guide you towards fixing both of your problems.If you see lack of motivation, then you are probably getting to the point where there is not enough 'success' in the current activity, and it's stagnating.In that light, think about what your ultimate goal for them is. For rec kids, it's cartwheels or handstands, or any number of spacial awareness skills without any real need for a salto. That said, all of your skills can be broken up and progressed to work towards the goal you have for that class. If the end of the class is about a cartwheel, break the individual classes into components - kicking, inversion, handstand, turning, lunnge, etc.. - and make your own simple drills to promote mastery and progression.Strength is also a necessary component - you can always add a conditioning station, and you can always add a handstand station.Note, this just for floor ex, as an example. You can do this for pretty much any event, with most skills. If you can, you will not only become a better coach, you will also get a better understanding of motion and energy, and probably find a deeper appreciation for the sport.Hope that helps!Ryan