Martin Lewis is urging hundreds of thousands of parents to get their hands on huge sums of unclaimed cash they are owed.
Addressing his audience and viewers on The Money Show Live, he said: "It's likely the worst investment you'll ever make. They cost £100,000s, rarely give back or say thank you, and once you do it, you'll need to keep shelling out again and again, and again... children!"
The Money Saving Expert founder said children are the subject of some of the most common questions he is asked.
