Hi, thankyou all for your responses. I specifically wish to be able to throw a single card, horizontally and have it explode (of sorts). Thankyou Mahoney for your input

your idea is a good one. I have no doubt that in this incredible physical world we live in there is some way to have the card spontaneously combust upon impact with a wall, however without the luxury of space-age materials/rocket scientists etc I am at a loss as to how to accomplish this...
Please keep posting your ideas...
I think the main barrier behind using some sort of explosive cap on the card is weight, specifically the card is not heavy enough to cause an impact which will ignite the cap. Also caps would need to be placed in several locations, as the card would of course be spinnning. To overcome the weight barrier, the card could be split as Mahoney suggested and a thin sheet of metal (aluminium etc) could be sandwiched between. Although I am unsure how this would affect the playing card's flight.
Are there any chemistry students on the forum? Another idea I had was using some sort of chemical reaction to ignite the card?
Obviously a chemical which reacts with air could ignite the card midflight however delaying this reaction for a couple of seconds (to allow the card to leave the hand) would be the key.
Does anybody know of two chemicals/substances which when combined will (after a short delay) cause a tiny explosion/spark (enough to ignite the flash paper layer on card). Or perhaps there is some way to add a chemical to one half of the card, and another chemical to the other half and have capillary action do the rest while the card is in flight?
Again please do not laugh at my blind ignorance
Thanks,
Donald
P.S. Anybody on the forum live in Brisbane, Austrlalia or anywhere nearby?