Internet and mobile phone games which are free to download are being investigated by the Office of Fair Trading.
It follows concerns that children could be tricked into spending money on upgrades, Daybreak's Jonathan Swain reports.
More top news
85% of products surveyed by the charity Action on Sugar were found to have more of the sweet stuff than Haribo.
New Psychoactive Substances Bill creates a blanket ban on the sale of legal highs, with up to 7 years in jail for selling them.
Pharmaceutical giant Roche is trialling a new type of treatment which could work better than chemotherapy.