I'll create a colorful, interactive math training app for Grade 1 students in Bulgarian! Let me first generate some design inspiration to make it visually engaging for children.

Now I'll create the colorful math training app with a playful, child-friendly design. Let me first read the existing files to understand the structure.

Now I'll update the theme to be colorful and child-friendly, and create the math game components:

Now let me create the math game component and the main page:

Now let me create the main page and the game component:

Finally, let me add a custom shake animation for the wrong answer feedback:

I've created a colorful, interactive math training app for Grade 1 students in Bulgarian! The app features:

• Vertical format math problems with addition, subtraction, and missing number challenges (all without crossing ten)
• 3 large, colorful answer buttons for each problem (green, orange, and blue)
• Bulgarian feedback messages: "🎉 Браво! 🎉" for correct answers and "😊 Опитай пак!" for wrong answers
• 25 problems covering: simple addition (result ≤ 9), addition with tens (10+5, 12+3, etc.), subtraction within same ten, and missing number problems (? + 4 = 6, 5 + ? = 8)
• Child-friendly design with: rounded corners, playful Nunito font with Cyrillic support, cheerful color palette (green, blue, orange, pink, yellow), large touch-friendly buttons, progress bar, and a celebration screen with animated decorations when all problems are completed