My six year old son loves these dragons (both sets). They are each individual and have their own names. They are not the biggest, but same size as his LEGO men so integrates well with them. We got him the skeleton army previously. He spends hours with them. They have so far managed to go with him to play, to bath and to bed without any trouble.
The only downside is for those barefoot parents out there like myself - they hurt like blazes when stepped on in the middle of the night (but on the plus side have not broken yet as a result).