First the minigames- These are stored on computers around the space station and also in discs found in sidequests. These are just simple little games that the goal is to pass the time on your Npc's will also set scores themselves and will give you a small reward if you beat them. This can also work for the forums in a "High-score" Thread. Then the toys- The toys appear in the npc's rooms these have no goal except to have fun while you wait for your robots to return from their missions or other things. Most of these are physics toys like a newtons cradle or a ball on a rubber string but you can have others to. Low priority suggestions but excellent time wasters.
I like waisting time... No I don't! I would probably go mining while my robots do their work! But I have to say that toys don't seem like a bad idea... If you can throw them at your npcs if they do the wrong things. Kind of like you do it with pets, just with humans...
Something like in Doom 3 with the Super Turbo Turkey Puncher would be cool. You could have a big TV on the wall and a game of space invaders or something that would be controllable.