Amaze your friends and family with a door bell, a solar alarm, a fridge alarm, and more with the LogiBlocs Alarms & Doorbell STEM science play set. Product features: Understand the world of technology around you as you create your own inventions Fun and engaging, teaching kids to create different devices with creative problem solving By plugging together logiblocs in different combinations you can create circuits and virtually write your own simple program to build each new invention Inside each Logibloc is a printed circuit board and every block is colour-coded for the function it performs 1 kit, more than 10 different smart circuits Control you own gadgets Battery requirements: 3 x AAA (not included) Suitable for ages 5 years +