Preheat your oven to 180 degrees (fan-forced) and line a slice tin (approx 28cm x 18cm) with baking paper. Make sure you leave some paper hanging over the edges to help you remove the slice from the tin later.
In a large bowl, combine the plain flour, oats, brown sugar and coconut and make a well in the centre - this is a great step for the kids to help you with.
Chop the butter into pieces and place it along with the golden syrup into a microwave safe bowl and cook for 30 second spurts until the butter has just melted. Stir to combine and set aside until needed.
In a separate bowl, combine the bicarbonate of soda and boiling water and then carefully add to the bowl with the melted butter and golden syrup. Stir to combine.
Pour the wet ingredients into the bowl with the dry ingredients and use a large metal spoon to mix until it’s just about combined - a metal spoon is best as the mixture doesn’t stick to it as much as a wooden spoon.
Add the chocolate chips and working quickly, mix through.
Pour the slice into your prepared pan and using the back of a spoon, press the mixture evenly into slice tray. Bake for 25 minutes or until the slice is golden brown.
Carefully remove the slice from the oven and allow it to completely cool in the tray.
Use the overhanging baking paper to remove the slice from the tin and cut into squares to serve.