All Available Episode All Series 10 Episode 1. Bicycles Feb, 1971 25 minutes 0.0 2. Trees Mar, 1971 25 minutes 0.0 3. Spirals Mar, 1971 25 minutes 0.0 4. Nails Mar, 1971 25 minutes 0.0 5. Eggs Mar, 1971 25 minutes 0.0 6. Cars Apr, 1971 25 minutes 0.0 7. Windows Apr, 1971 25 minutes 0.0 8. Water Apr, 1971 25 minutes 0.0 9. String Apr, 1971 25 minutes 0.0