Workout:

pushup circuit –  yoga, regular, yoga, twist, yoga, arm raise (do 5 of each of the pushups with minimal rest in between)
20 chops on a bosu ball
20 dips
20 shoulder shrugs
20 pushups with feet on a chair
bridge hold with 10 leg extensions (hold your body in a bridge position – butt off the floor and extend your foot from your knee. You will be balancing on your opposite leg, but make sure not to let your butt sag. Alternate legs and do 10 total extensions)
20 crunches on a yoga ball
20 lunges on a bosu ball
ab circuit – regular crunches, leg lifts, side to side touches, flutter kicks (flutter your feet about 4 inches off the ground while you are lying on your back), plank, bicycle (do each exercise from 1 minute, for a total of 6 minutes)

Challenge: regular pushups to exhaustion (make sure to keep track of your records)