The Bosu (apparently named this from the fact that you can have ‘BOthSidesUp’) is another great workout tool. It requires more balance and coordination, so please only attempt if it is within your range of ability! If you choose to begin using the bosu, make sure you do the movements slowly and with careful form. Modify the some exercises by holding onto something for balance. It is easy to slip up and an ankle, knee, or hip can be heading the wrong direction. Additionally, you will notice I always integrate some kind of jumping within my workouts (jumping onto or over things–plyometrics). I encourage you to modify the ‘jump-overs’ to regular jumps in place or to jumping jacks.
…and I have left the portion of the video where I am face down sprawled over the bosu….for your amusement of course:)
pushpullswing 
and you wonder why Lil’ Bear is so active….jumping, climbing, sit-ups, pull-ups [and I don’t mean his pants], roll-overs, and high kicks. Great training Mom. Go You.
Lil Bear has been doing plyometrics since day one in utero.