Puzzles – knob-puzzles
Brand
- Bigjigs Toys
- Blue Orange Games
- Carson Dellosa Education
- Creativity Street
- Critical Thinking Co.
- Didax
- Eureka
- Gibby & Libby
- Guidecraft
- HOHNER Kids
- Hygloss Compoz-A-Puzzle
- Junior Learning
- Key Education
- Kwik Kitz
- Learning Advantage
- Melissa & Doug
- North Star Teacher Resource
- POPAR
- Pressman
- Primary Concepts
- Round World Products
- Stages Learning Materials
- Teacher's Friend
- TREND enterprises, Inc.
- Tuzzles
- What America Buys
