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Logiblocs Alarms & Door BellBuild Useful Electronic Circuits And AlarmsA starter kit for you to explore the world of Logiblocs. What do you get?4 plug together blocks including POWER BASE, BUTTON, LIGHT SENSOR, BLEEPER and a detailed instruction booklet.What can it do?Over 10 projects and applications such as Door Bell, Solar Alarm, Fridge Alarm, and many more.