One

Lie face up flat on the ground with the feet flat on the floor and the knees bent up in the air.

Two 

Place a kettlebell on the ground over the head, reach overhead with both hands, and grip the kettlebell by the handles. lifting the back off the ground to perform a crunch. 

Three

Lower slowly back to the floor, and once the back is flat on the ground lower the kettlebell back overhead.