My grandson (8 Yr old) and I have switched to DCC and have three steam locos with DCC installed.  We have a number of older DC Diesel Locos which we got with a bunch of HO train stuff from a former HO enthusiast.  My grandson loves the diesel locos and we are wondering if these old locos can take DCC and/or if it's worth installing.

I tried to upload a picture of the loco, but it wouldn't take the post!  It's red and silver number 307.  Hope that helps.