Various strings of Christmas lights which sadly do not work (St Just TR19)

Would anyone be able to find a use for some strings of Christmas lights with plugs, all bulbs are small, some coloured.. they were all the simple older type, not flashing or garish.They could perhaps be made to work with replacement bulbs , fuses etc.. or perhaps they will not...no promises !. I have just kept them for years but never get round to trying to restore them! .....hate to waste things. I remember my Dad replacing the little bulbs on our one string, and success ! As I say no promises with these ones, they may be unobtainable etc...