Place the ice-cream in a freezer bag, and when it's just started to soften cut the corner off the freezer bag and pipe it into each ice-cube tray compartment. Place the tray back in the freezer until ice-cream is set hard.
Melt the chocolate into 3 separate bowls, and add chopped hazelnuts to the milk chocolate and stir.
Turn out the ice-cream cubes and add a toothpick to add each one, then dip them in the different chocolate mixes. Remove the toothpick and enjoy!