• Snowflake Designs

  
  
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• Spinning Action
  
  
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• Christmas Flower
  
  
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• Random Natural 3D tree
  
  
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• Simple Three-Letter Cube
  
  
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• Arithmetic Sculpture for Addition and Multiplication
  
  
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• The Universe in a Popup Book
  
  
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• Flying Saucer Builder
  
  

• Phones Puzzle
  Karl Scherer
• Passages Puzzle
  Karl Scherer
• Doshu Puzzle
  Karl Scherer
• Tilt Puzzle
  Karl Scherer
• Marbles Puzzle
  Karl Scherer
• First Puzzle
  Karl Scherer
• Capetown Puzzle
  Karl Scherer
• Coldice Puzzle
  Karl Scherer
• Doors Puzzle
  Karl Scherer
• Angel Puzzle

More Demonstrations to try

• Three Connected Vessels	Cone Placed on a Sphere	Periscope	Simple Bar Chart	Pie Charts
  What Color Is the Bear?	Think Big, Really Big!	Sunny Random Rays