December 5, 1972
Series 12
01. Puddles and Pools
No details
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December 5, 1972
02. Spots
No details
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December 12, 1972
03. Animals
No details
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December 19, 1972
04. Lines
No details
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January 2, 1973
05. Doors
No details
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January 9, 1973
06. Wheels
No details
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January 16, 1973
07. Bricks
No details
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January 23, 1973
08. Balance
No details
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January 30, 1973
09. Metal
No details
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February 6, 1973
10. Weather
No details
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February 13, 1973
11. Nets
No details
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February 20, 1973
12. Clocks
No details
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February 27, 1973
13. Pipes
No details
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March 6, 1973
14. Uniforms
No details
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March 13, 1973
15. Numbers
No details
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March 20, 1973
16. Water
No details
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March 27, 1973