Class 1 Math Workbook Creation

I need a mathematics workbook for class 1 students, consisting of 80 to 100 pages. The workbook should cover the following concepts:
- Basic addition and subtraction
- Counting and number recognition
- Shapes and patterns

Ready-to-use characters will be provided for illustrations.

Ideal Skills and Experience:
- Experience in Mathematics content creation
- Strong understanding of early childhood mathematics
- Illustration skills or experience in integrating provided characters into designs

Please provide samples of previous similar work.