Interactive content containing audio or video may be provided in conjunction with non-interactive content containing audio or video to enhance user engagement and interest with the contents and to increase the effectiveness of the distributed information. Interactive content may be directly inserted into the existing, non-interactive content. Additionally or alternatively, interactive content may be streamed in parallel to the existing content, with minimal modification to the existing content. For example, the server may monitor content from a content provider; detect an event (e.g., a marker embedded in the content stream, or in a data source external to the content stream); upon detecting the event, play interactive content at a designated time while silencing the content stream of the content provider (e.g., by muting, pausing, playing silence.) The marker may be a sub-audible tone or metadata associated with the content stream. The user may respond to the interactive content by voice.