If you have a Olimex PIC-MT Dev Board near by, you may want to try this popular Simon memory game modification that has been developed by geeksinside.
Geeksinside did a review of the Olimex PIC-MT development board so you may easier to decide if it fits your needs. Or there is another option. They are currently running a tips contest this month and giving away a second Olimex PIC-MT. So don’t hesitate and try your luck.