They certainly did hunt and kill animals. Most probably they also killed each other from time to time.
sex
stabbed them with sharp sticks
No not really, neanderthals were all about surival.
Neanderthals
If neanderthals were real? With water, or dirt.
The Neanderthals were born about 40,000 years ago
No. Neanderthals existed in pre-Judaic times.
Neanderthals used there feet for transportation
Neanderthals used a variety of tools such as spears, clubs, and thrusting lances to hunt large animals. They likely hunted in groups, coordinating their efforts to take down prey. Evidence suggests they were skilled hunters capable of ambushing or outrunning their prey.
It is incorrect to refer to Neanderthals as "Neanderthals' world." Neanderthals were a species of ancient humans that existed in the Paleolithic era, while "Neanderthal" is often used to describe the species as a whole. "Neanderthal" and "Neanderthals' world" would not typically be used interchangeably in a documentary about them.
Neanderthals are early humans, therefore they are mammals
Neanderthals are extinct, no interaction exists.