This is my first own design, I've created this modular crochet board. 

It is designed to be snapped on same as puzzle. 

I've made several tests and this last version has a good connection, not too loose, not too strong as you can see in the photos.

Dimentions

• Board: 195x195x15mm
• Hole
  • 3mm of diameter (it fits perfectly these barbecue wood sticks)
  • 10mm of spacing between each hole
  • 10mm deep