Front Description
This open stock Japan DS set features Pluto playing maracas, Pluto playing bongo drums and Pluto playing the tambourine. Pluto's name is spelled out on two of the pins and the center of the "P" and "O" are not circles, but stars. Primary colors have been used on this set, blue, red, green yellow.
I don't think this is Baby Pluto, I think this is Pluto drawn in the style of The Dog. The Dog was very popular in Japan when these pins came out. (For those not familiar with The Dog: The Dog is a line of stationary, t-shirts & toys based around cute photographs of dogs taken with a distorting lens so their heads appear larger than normal -- and the noses are really huge! For more info, see http://www.thedog-club.com/ )