Unless you buy a "chip-on-board" circuit ;-)
The term "chip" is slang for an 'integrated circuit' (or IC) - it's a collection of electronic bits that are all jammed into a single component to make our lives easier. The 'chip' mounts on a 'board' - or Printed Circuit Board (PCB or PC board) which usually has several other support components on it - LED's, transistors, switches, etc. If you buy a chip like the ones from Brian or JoeD, you'll need to mount it on a board of your own design. If you buy Brians or Hamiltoes completed boards, all the extra support stuff is already mounted and you just need to solder on the wires in the right places.