it is a good age to start on obedience work , simple commands like sit, drop/down, stay, and come are good ones to start off with.

as rascal is a puppy and puppys love to chew you could give rascal some puppy chew toys to play with, and as the tugOwar game you should NEVER let a dog win, by letting a dog win you are pretty much telling them "you are boss" and "you can boss me around" keep working on the "release" command, and help it along by offering rascal a tasty treat and he should give the toy up.

as for the glasses and jumping up at them that is where obedience commands come in handy, like "rascal only gets petted if he sits on command and acts calm (calm enough as a young pup can be )

well i hope that was some help to you and good luck with being and aunty and if you need anymore help just ask