Think back to when you were a young kid. You probably didn't think to yourself: I have to get my thirty minutes of cardio in. Why? Because, when we were younger we wanted to be active. Chances are, you were in either soccer or dance, baseball or lacrosse, and you spent your summers swimming in the pool or playing manhunt. Being active was not a chore, but a fun way to socialize. Well, we're here to prove that working out can still be fun, and most importantly, free! To get your body ready for bikini season, click through this slideshow for 5 fun workouts that will have your heart pumping and bring you back to feeling young and carefree.