Imaginarium

From Smurfology

The Imaginarium was a special room in Homnibus' hovel that allowed anyone to see whatever it is that they imagine and share it with others, seeing it as if they were actually there.

In the episode "Papa's Day Off", Homnibus invited Papa Smurf to use this room to imagine how his little Smurfs would have handled Bigmouth the ogre rampaging the village's smurfberry bushes if he were not there to lead them.