Kids' Coloring Touchscreen App

I need a colorful and playful touchscreen coloring app for kids. The app should be built in VVVV and run on a Windows 11 Mini-PC with two Full-HD screens (one touch, one monitor).

Key Features:
- Touchscreen app for kids to color 6 provided images (color + B/W vector).
- Basic coloring tools: brush, pen, fill, eraser.
- Symbol-based UI, no text.
- Color selection: preset colors palette.
- Saved images displayed on second screen as a slideshow:
- Newest image: 90s
- Others: 15s each
- Resets to start screen after 90s idle.
- On reboot: delete all saved images.
- Must be stable for 12h/day, kid-proof against random touches.

Ideal skills and experience:
- Proficiency in VVVV
- Experience with touchscreen application development
- UI/UX design for children's apps
- Strong testing for stability and reliability

Please provide experience details, rough cost, and time estimate.