CUSTOMIZED MAGIC ITEM

I WANT TO MAKE A CUSTOMIZED MAGIC ITEM (ELECTRONIC). SUPPOSE I HAVE SEVERAL SMALL PIECES OF PAPER AND ON EACH PIECE OF PAPER ONE NAME IS WRITTEN AND THEN THE PIECE OF PAPER IS FOLDED.I PUT ALL THE PIECES IN A BOWL. NOW I WANT TO REPLACE ALL THE PIECES WITH OTHER SMALL PIECES OF PAPER. THIS CAN BE ACHIEVED AS FOLLOWS:- IN THAT BOWL THERE MUST BE SECRET COMPARTMENT WHERE PIECES TO BE REPLACED ARE KEPT. WHEN A SWITCH IS PRESSED THE PIECES UNDER IT MUST HIDE AND PIECES IN THE SECRET COMPARTMENT ARE BROUGHT. THERE CAN BE OTHER WAYZ TO ACHIEVE THIS FEAT. ANY METHOD CAN BE USED AS LONG AS IT IS DECEPTIVE. I CAN BE REACHED AT .ATUL3147ATGMAILDOTCOM