Edu Science Know How Demolition Zone Create custom-designed buildings with the panels and connector clips. Experiment with the power blast modules and strategize placement for endless demolishing possibilities. Discover the principles of force, power, momentum, leverage, and gravity in a fun way. Realistic explosion sounds add a cool effect. Includes 68 building walls, 68 connector clips, 33 rooftop/floor panels, 2 bridge pieces, 2 smokestacks, 3 power blast modules, 1 master detonator control panel, a sticker sheet, and instructions.