These, days, there is no stopping a child from growing up without the influence of tech gadgets, online content, and the Internet in general. Being a parent is already a tough enough task, but shying away from the topic or completely shutting out technology from your children's lives isn't going to help.
What you can do however, is to have more control over what they are exposed to while on their gadgets, and this post will try to help you with that, particularly on Android.
Google Play Store may not have tougher restrictions than those found on Apple's AppStore so if your kids own an Android device (or have access to your device at their liberty), you might want to set up some of these parental apps to help you monitor your kid's online activities on the device. Some allow restrictions of online sites they can visit, the monitoring of their text or call usage, app downloads, location and how long they can spend on their devices.