The document discusses lessons learned from designing an app called ArtikPix for children with speech delays. Key points: 1. It is important to check design assumptions with experts like speech therapists to identify potential issues. Feedback revealed images could distract children with autism. 2. User testing is also critical, as it uncovered that allowing simultaneous playback and recording improved the app's usability. 3. Observing students revealed some had trouble pressing buttons consistently, so buttons were changed to work on initial touch instead of requiring touch and release. Future work includes adding tutorials to help adults use the app and incorporating new features like video capture.