What weapons did they use to kill the animals in stone age?

The stone age people use to kill animals because they wanted to eat.Nothing has changed today also we kill animals to eat.The only change happened that is that the society divided in two categories.Vegetarians and Non vegetarians.
When stone age people use to kill animals they realized that the skin can be used to wear.They then started killing them for skin too.Nothing has changed today also we kill them for their fur and skin and today it is luxury.