Blender Secrets: Ragdoll (the easy version)

Create a floor plane and set it to Rigid Body - Passive.

Create a ragdoll from a bunch of cubes.

Set all the cubes to Rigid Body: Active.

If we play the simulation by pressing the Spacebar, they all fall down. So far so good.

Now to connect all the body parts, select two at a time and go to the Object Menu, Rigid Body > Connect. In the Connect menu, set it to Point.

Select the connection and set Disable Collissions: OFF.

Repeat this for all the parts that should be connected to each other.

Parent everything except the floor to a new Empty so you can easily move it around.

Hide the relationship lines under the Overlays options.

Play the simulation to check that everything works.

For a bit of fun, create new object and set it to Rigid Body - Passive and check animated.

This way you can interact with the ragdoll in real-time.