Normal Samsung glasses are too large for small heads, so I bought a pair of these for my 10 year old son. These fit him well & he is happy with compared to the normal ones.
Having said that, I do agree with the review of another reviewer, who says that for younger children they may actually still be too big and heavy. I think Samsung almost need to introduce a smaller "Juniors" size for children around 6 years of age, or perhaps some way of adjusting the size - perhaps a strap or telescopic type stems for placing behind your ears.
I am giving theses glasses a 3 rating because they fit my son well & also that 3D TV at home is in reality still in it's infancy - there will be issues with early adoption of this type of thing. the pricing still needs to come down - I would expect a pair of glasses to cost no more than £20 & this is the main reason that I have not given these a 4 rating. Perhaps Samsung could use cheaper packaging, rather than the tough casing box that this comes in - that would have a positive impact!
Roll on True 3D that doesn't require active glasses!!!