Your grey is so much sweet and cute and it reminds the childhood of my Revo(which is also same as yours) and I know how much I was happy playing with it.
But it has died a year ago.
Boot Camp Chino Hills
In my opinion the best way to lose weight is cardio and some best cardio exercises are
1- Swimming
2- Running
3- Yoga
4- Rope skipping
5- Cycling
Boot Camp Chino Hills