Tetris
Shapes
Boxes and Lines
Triangles
Maze 1
Maze 2
Concentric Lines
Lines
Concentric Lines ontop of Tetris
Triangles
Concentric ERIC
Boxes and Lines 2
Concentric Lines 2
L Shapes
Boxes with Patterns
Angles
Triangles and Squares
⊔, ⊓, ⊏, and ⊐
Triangles and Diamonds
Tetris Lines with a Box and Triangle Fissure.