Act as a senior product designer with 10+ years of experience in children's healthcare products. Create a highly detailed, photorealistic 3D render of an AI-powered electric toothbrush designed specifically for kids aged [3-8 years old]. The toothbrush should feature [interactive LED lights] that change color during brushing, a [friendly cartoon character handle] (choose between dinosaur, unicorn, or robot themes), and [AI voice coaching] that gives real-time feedback. Show the product in a [vibrant bathroom setting] with natural lighting, positioned on a counter next to child-friendly toothpaste. Include subtle UI elements showing the AI's smart tracking capabilities like brushing duration and missed spots. Use bright, playful colors that appeal to children while maintaining a premium, technological aesthetic. Render at 8K resolution with crisp details showing the ergonomic grip and soft bristles.