Series 12

E1. Puddles and Pools

Dec 5, 1972

E2. Spots

Dec 12, 1972

E3. Animals

Dec 19, 1972

E4. Lines

Jan 2, 1973

E5. Doors

Jan 9, 1973

E6. Wheels

Jan 16, 1973

E7. Bricks

Jan 23, 1973

E8. Balance

Jan 30, 1973

E9. Metal

Feb 6, 1973

E10. Weather

Feb 13, 1973

E11. Nets

Feb 20, 1973

E12. Clocks

Feb 27, 1973

E13. Pipes

Mar 6, 1973

E14. Uniforms

Mar 13, 1973

E15. Numbers

Mar 20, 1973

E16. Water

Mar 27, 1973