Love your card - Very very cute!!! what did you use to punch the Batty For You spikey circles out?? Is it a punch?? (the outside matting of the circle)
1. Attach piece of cardstock to inside lid of empty stamp case using masking tape (looped to provide sticky attachment).
2. Add some drops of ink and marbles to inside base of stamp case.
3. Close lid and roll marbles around in the ink.
4. Flip the case upside down and roll the marbles randomly over cardstock piece.
5. Continue until the look you want is achieved, then remove from stamp case and apply to project.