Since the common Eisenhower Dollar has no silver, putting bleach on copper/nickel will make some funky colors. There is no simple or easy household item to turn this dark. I can suggest baking it in the oven. Yes. In the oven. That should darken it some. Otherwise, normal hand use will dark them up.
I hope this helps. I highly suggest investing in Morgans. I promise the investment is well worth it. It took me six months to find, save, and purchase my set of Morgans.