Source google image: https://ae01.alicdn.com/kf/HTB1pBWBIpXXXXbmaXXXq6xXFXXXY/Gift-for-Kids-Quality-IQ-3D-Brain-Teaser-Brick-Puzzle-Game-Toy-for-Children-with-60.jpg_640x640.jpg
Puzzle brick
Source google image: https://ae01.alicdn.com/kf/HTB1pBWBIpXXXXbmaXXXq6xXFXXXY/Gift-for-Kids-Quality-IQ-3D-Brain-Teaser-Brick-Puzzle-Game-Toy-for-Children-with-60.jpg_640x640.jpg