Why do bones of older people break more easily than younger peoples?

The simplest way to break a bone is to apply enough force on it, until it cannot hold. In other Words, if you hit it hard enough, it will break.

If there is a sudden large amount of pressure on a bone it may break. This can be from as little as a hairline fracture to a fracture where the bone has snapped in two.

There are various types and pattern of fractures. It may be:

Closed, open, splintered, dispaced

Transverse, spiral, oblique, greenstick, compression are patterns of fracture

why do you want to

Well i guess you could jump of your roof or something? Make sure its not too dangerous though!