It’s best to delay your kids exposing to confectionery.
I now know why my mom had stopped me and my brother from eating sweets or crisps for as much as possible. This is because after observing for days, I notice that Marc will cough quite badly in the middle of the night when he has eaten more sweets or chocolates. Luckily, the next morning the cough is gone but he keeps coming back and asks for more chocolate again and forgets what has happened to him the night before and he has cried so badly.
And lately Marc has been crazy about chocolate or sweets, in particular Kinder Surprise Eggs. He likes the toys inside of course.