A method of playing a computer game and the game itself, using a computer and a plurality of collectible trading cards that each has a unique code that is hidden under a removable coating. In the volumetric three-dimensional display panel, two-dimensional images are displayed on the two-dimensional flexible display panels to form a single three-dimensional image, and a display surface of the volumetric three-dimensional display panel is curved with a predetermined curvature or is flat. A shaft is also included that is axially displaceable and rotatable from the front end of the device. The actuating assembly can thus be selectively actuated to move the one or more sticker support brackets in a manner such that one or more stickers are contacted and lifted by respective sticker support brackets and moved from a sticker in-feed conveyor to respective sticker trays supported on respective fork arms with no substantial rotation of the one or more sticker support brackets. The improved cross-linked fracturing fluids are basically comprised of a gelling agent, seawater present in an amount sufficient to hydrate the gelling agent and to form a gelled aqueous fluid, and a delayed cross-linking agent, capable of causing delayed cross-linking of the gelling agent in the gelled aqueous fluid at a pH below the threshold for precipitate formation in seawater.