Cheap ways to get wider

Put your wheels on inside out. The stock blaster wheels can be flipped around and it makes the tires stick out wider.
Do a search on ebay, there are companies that sell widening kits. They are like wheel spacers only on the inside of the a-arm. I dont like them but some people do.
I wouldnt recommend spacers. Unless your racing, a good suspension isnt really needed that bad. If you want a wider bike save up for some good a-arms and shocks and a better axel. For now, you can get a banshee axel and put it on your blaster. Its wider.
Flip front wheels, and banshee axle on the rear.

Thats +3 in the front, and +2 in the rear on the cheap.