Graceful By Design Reusable Grooved Handwriting Workbooks for Kids With Disappearing Ink

The complete set includes 4 workbooks: 

1. Letters and First Words
2. Numbers and Shapes
3. Pattern, Colors, Drawing, and Logic
4. Addition and Subtraction

The complete set also includes 8 magic pens, 8 ink refills, and 4 practical grips to teach the child how to properly hold a pen/pencil. 

It also comes in smaller sets of 2 workbooks:

1. Letters and First Words
2. Numbers and Shapes

Or:

1. Pattern, Colors, Drawing, and Logic
   
2. Addition and Subtraction
   

These include 4 magic pens, 4 ink refills, and 2 grips.