We were at Mysore last Sunday and among other places, we visited the Mysore Royal Palace too. There were three types of tickets available :
So, it has been publicly firmanned that foreigners visiting the palace are neither adults not children. (Somewhat reminded me of my OB teacher Raji Philip who described the boardroom of a company as having three types of toilets, one each of the ladies and gents, and one for the Directors!!)
The Mysore Palace is grand, and the only downer is that you are not allowed to take your camera inside the palace.
The palace looked absolutely dazzling during the evening lighting though (thankfully, nobody- adults, children, or foreigners needs to buy any tickets to see the lighting), take a look at the picture taken from my phone(the picture hardly does any justice to the real thing but nevertheless). The sheer size of the palace compound appears quite overwhelming.
Ankur has shared some real cool pictures of Mysore.