A complete stand alone set or can be used to expand on existing run elements. Small yet powerful, the switches turn and make it possible to aim at two terminals at once. 

Includes: 

• 15 building blocks
• 22 run elements
• 2 special elements
• 3 marbles
• 1 base-plate

Suitable for ages 4 . Especially intriguing for master builders ages 8-12 years.