Two engines, one flow. Left: the sentence engine builds utterances word-by-word in the speech bubble. Right: QuickChat offers complete follow-up sentences after the child speaks. The engine powers both — predictions during building, full sentences after speaking.
Mockup at display scale (38px tiles). Actual iPad tiles are 60pt minimum. Toggle tiers to see how QuickChat adapts.
Child tapped "want" on the bottom edge. Bubble shows the composed word + 4 noun predictions ranked by kitchen scene context. Dashed borders = predictions from the sentence engine. Child taps a prediction to add it, then taps ▶ to speak the 2-word phrase. Tier 2 max = 2 words.
After speaking "Want pizza", 3 follow-up cards rise from center stage. Each is a complete 1-2 word sentence spanning a different pragmatic function: requesting, commenting, social. One tap speaks the whole thing. Scene dims 15% to draw focus. Tapping a card speaks it → tray refreshes with new follow-ups. 3 options matches clinical validation for choice-making research + Switch Control compatibility.