you could turn them into USB thumb drives, or USB hubs
or, (evil grin) film yourself blowing them up, but dont mention that there boots, then post it on youtube on the 1st of april, big LULZ at all the 'OMG what the hell have you done!' type comments!!
YAY!, last game of the year for me, outside of christmas presents;
'space harrier' for the 32x, £20