I admit my sons have had fun with these; but only until one broke, less than six hours into Christmas day. Amazon were fantastic in response, sending out a replacement next working day (over Christmas!) :) but sadly this also broke, within 20 mins of opening. Painful scenes with 8 year old in tears :( Have now received notification from Amazon that we are not the only ones with a problem & are going for a refund (still have devastated 8 year old - he was so careful with the second one, yet still it broke) I don't recommend this - the sonic is much more durable, plus has UV light AND a pen/invisible writer!