Place room temperature butter and brown sugar into a medium sized bowl and ask the children to mix it together well with their hands. (Alternatively cream with a hand blender or wooden spoon until light and fluffy)

Add the flour, vanilla and sweetened condensed milk and stir well with a wooden spoon. When the liquid is well incorporated get the children to mix it up even further with their hands, making sure all the dry bits on the bottom of the bowl get mixed in.

Add the chopped white and milk chocolates and mix with hands (or a wooden spoon) until thoroughly combined. Set aside in the fridge to chill for an hour. Lick fingers clean (yay!)

Roll the raw chocolate chip cookie dough into one inch balls (or any shapes the children want - logs, flat circles, doughnuts, etc. Let them use their imaginations!) and chill in the fridge for a further hour.

Place the dark chocolate, broken into pieces, into a heat proof bowl suspended over a pan of barely simmering water. Stir until melted.

Dip each cookie dough ball into the melted chocolate to coat. Allow the excess to drip off before placing on a piece of greaseproof paper, a silicone mat or in a petit fours case.

Chill in the fridge for an hour or until the chocolate hardens. Store the cookie dough balls in the fridge as they taste better cold (we think).