Dead rising! how do you get the character to wear the servebot mask?

i need to know on xbox360's dead rising game, how you get the character you control to put the servebot or lego head mask on? is there any other cool things like that also?Dead rising! how do you get the character to wear the servebot mask?
You should be able just to go straight up to it and the option will appear and then you put it on. Other cool stuff would have to be the bear head, cross dresser outfit, samurai sword, right in the begining if you go down over the coffee store there is a little kids clothes shop, lol all kinds of fun stuff in there.