Graciousness on Public Transport

The Graciousness on Public Transport campaign began in June 2014. I only managed to see all 5 of the Thoughtful family characters at one of the underground MRT stations. I have not seen them at the two above-ground stations which I frequent, namely Commonwealth and Boon Lay. 

(Source: LTA)

However, I find them a bit familiar... Oh you know they look like those yellow cylindrical creatures who have one or two eyes.... lol :P

(Source: http://partyhatmy.blogspot.sg/2013/09/minion-party-theme.html)