Melt the 3 kinds of chocolate in 3 separate bowls. Stir half of the crushed candy into the semisweet chocolate. Reserve a bit for sprinkling; stir the remainder into the milk and white chocolates. Drop teaspoons of the semisweet onto a parchment-lined tray. Top with 1 dollop each of the milk and white chocolates. Sprinkle with crushed candy. Let harden.