Which child does not dream of being alarmed when a diary, door or jewellery case is opened? Here they can build a simple but effective alarm.

Contents:

• transistors,
• resistors,
• cable,
• buzzer,
• drawing pins,
• battery clip,
• copper sheet,
• double sided tape,
• base board and
• instructions.

From 10 years, an introduction to the basics of electronics.