Boomerang is an application from Instagram where the user can create looping videos of moments through the burst capture of images. These short videos can then be uploaded by the user to their social media accounts.
Why is it a risk?
Users don't communicate through the app directly - it is an app designed to help create content which is then uploaded to social media. In this sense, the app itself isn't inherently risky, although children using the app should be reminded to be conscious of the type of content they choose to create and upload. The app can in theory be used to create inappropriate content, or content which unwittingly displays personal information which would place the user at risk upon upload.