Step 6: The Three Variable Blocks

Action:
  • Demonstrate the Set block (replaces the value).
  • Demonstrate the Change block (adds/subtracts from current value).
  • Demonstrate the Value Reporter (the oval token).

Speaker Notes:

"Now you see three blocks. The Set block is like erasing a sticky note and writing a new number—it replaces everything. The Change block is for math—it adds to what is already there. To subtract, just use a negative number. Finally, the Oval is a 'token'—you drop it into any other blocks so the robot can 'read' the current value of the variable."