At Your Fingertips: Cylinders (1970)
- Genre: Documentary
- Release Date: 1970-01-01
- Runtime: 0h 10min
- Language: English
- Production Company: ACI Films Inc.
- Production Country: United States of America
- Directors: Mary Anna Winkler, Peter Erik Winkler.
Instructive short on using cylinders to construct all manner of fun objects.
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| Directing | Mary Anna Winkler | Director |
| Directing | Peter Erik Winkler | Director |
