Combine the Weet-Bix, coconut, Milo and Condensed milk in a big bowl and stir until it's a consistent texture.
Spoon out chunks, about the size of a dessert spoon, and have the kids roll them into balls.
Now roll the balls in coconut or sprinkles and repeat. Pop them in the fridge and eat them cold. They also freeze really well and can be eaten straight out of the freezer.
I couldn't tell you how long they will last, because they have never lasted long in our house.
Recipe by Patchwork Cactus at https://patchworkcactus.com/milo-balls-recipe/