Coloured tights, an array of pearlesque beads in different sizes, Cream/white coloured string, Thin needle (must be able to go through a bead), Household bleach, Sponge, Unused Toothbrush, Rubber gloves, Bathtub or sink, an open window!
Tip: try not to thread too many beads at one go, they may get quite heavy and snap off. Be creative about the beads, add a bit of coloured beads here and there if you wish, and try organic shapes or even geometric… Repeat for other leg. (Or don’t – I didn’t.) Personally I ended up loving the dyed tights effect so I’m planning a similar fate to all my other coloured opaque tights, they shall suffer an acid shower and reincarnate as a superior sartorial species.