Cycling is a very good way to get your 9 to 10 year old boy active. If you love cycling getting your boy a Mongoose Montana Boy's Mountain Bike 24 Inch Wheels is a very good idea.
You can go cycling and take him with you. There is nothing that is more enjoyable than doing some kind of sport as a family and cycling is one of the ideal ones. Make sure you get him a good bike though, as it is important that he learns to use the gears correct from the start.
So, you have to look for a bike with good gears and you also want a bike that will be up to the abuse it is sure to get from a 9 year old boy. This, of course, rules out all those cheap boxed ones you can get at the discount stores.
Now it is also true that you do not want to spend a fortune as he is only going to use it for a few years and the he is going to outgrow it. This means you also do not want to pay too much for it. You have to look for a sort of "in between" bike. Not the expensive ones you will get a specialist stores, but also not the cheap stuff.
To really enjoy your cycling with your 9 or 10 year old boy, it is important that you take the time to look at all your options and get the bike that is exactly right. Having a look at the Mongoose Montana Boy's Mountain Bike 24 Inch Wheels as one of your options is a good idea.