There are several differences between the Old and New Stone Ages, but some of the most notable include the advancement of tools, the warmer climate and early humans learning to grow food instead of only being hunters and gatherers. Even with these advancements, the older style of tools and weapons were used during the New Stone Age.
Some of the first tools used in the Old Stone Age were created by flaking. This involved using a hammer stone to strike the other stone on the side, narrowing the edge. Many of these flaked tools were turned into composite weapons by tying them to spears or arrows with sinew. As time progressed into the New Stone Age, the quality of the tools improved with the grinding of edges and polishing of the stones.
In the Old Stone Age, you would not find domesticated animals on a regular basis. The occasional dog might appear, but most domestication did not occur until the New Stone Age. The warmer climate meant that people could stay in one area and not have to forage or be nomadic unless they chose to be. They could grow crops and keep animals year round in one place. The development of agriculture was a major step in the developments of the stone Age.