PARENTS of Primary 6 pupils often face a tough time when it comes to picking the right secondary school for their children. But the children themselves also feel a bit apprehensive and worried as they are unfamiliar with secondary school life. To help dispel their fears, pupils and parents were offered a valuable opportunity to experience secondary school life early this week. About 140 pupils from 24 primary schools in Tai Po and their parents took part in a special event called ''Law Ting Pong Secondary School Experience Day''. The event was the first to be organised by the Tai Po-based new school. According to headmistress Mrs Emily Ma Fung Wai-yung, there was an underlying reason for organising the event. ''When we moved to the district in January 1992, we wanted parents to know more about the school,'' Mrs Emily Ma said. ''When they are allowed to come and take a look they can then decide for themselves whether they like the school or not.'' Subjects introduced to the visitors were Design and Technology, Home Economics, Art and Design, Integrated Science, special English lessons with native-speakers and a ''Life Education'' lesson, a specialty in the school. ''We use the term 'Life Education' as we want students to learn about life skills which are very important. We have a complex of civic, moral, sex, career and environmental education which are all under the umbrella of this practical subject,'' said Mrs Ma at the special day on Monday. Parents took part in a discussion where they were also provided information on how to prepare their children for secondary schooling by members of the school's Parent-Teacher Association. To round up their day pupils and parents were invited to watch an enjoyable and entertaining talent show presented by students of the school. Mrs Ma said chances were good that a similar event would be organised next year as the response had been excellent.