Is there a way to block purchases

[calypsocowboy]

Is there a way to block purchases in the app store. I've downloaded a number of free games and while playing them my son accidentally purchased one.

I've instructed him not to click on anything that says purchase or buy. But wondered if there was a way to password protect or block purchases.

 

[Susido]

I'd really like to know this too. Seems like an incredible oversight for Google not to offer any protection for purchases that could be made by anyone who has access to your unlocked phone for even a few seconds.