We welcome back TED talks for your Friday viewing pleasure. Here Gever Tulley teaches life lessons through tinkering at his school in California. In a world gone crazy with health and safety, it's good to see innovation in learning is still alive and kicking.

If you would like to nominate your favourite TED Talks (www.ted.com), drop us an email (editor@trainingzone.co.uk) and the most popular will be posted next Friday.