I have a lovely friend who insists on showing my ds all the things that they toys at her house do.
Ds watches her and then just copies what she has done, loses interest quickly and walks away.
When I get toys from the toy library, I just put it in the middle of the room and let him approach it when he is ready and then praise him for making various bits work, he seems to play with the toy for longer and more importantly wants to show me what he can do.
So which camp do you fall into?