"Careful Mr. Toymaker" is a song by a rapper/director/other stuff named Mickey "The Microphone Demon" aka Me.
It was produced by The Electric Cheese (formerly known as mrSimon/mrSimonALT) which he has a youtube account currently named "electricthecheese" (i would also like to thank him for the production)
This song contains samples from The Brave Tin Soldier, a cartoon made by Comicolor
