Start off with a Base Coat :) I personally love this one, it gives me a smooth surface to work on, and it does great protecting your natural Nail :)

Gather your supplies :)

Start off with the outline if the mouth.

Close it together and fill it in.

Add your brown around the mouth.

Get a small paintbrush or Striper

Start with his teeth (he has 4 on top, and bottom)

Finished

Add black eyes

White dots inside the eyes

Touch ups on teeth

Topcoat :)