The hammer strike gives the ball new momentum – enough to propel it several levels upward again. Once the hammer strike is installed, the part with the metal ball must be turned upwards. When a rolling ball then hits the hammer strike, the metal ball drops down and strikes the ball forward with force. With the modular and compatible marble run, where nothing wobbles or slips, spatial imagination and basic physical laws are taught. Whether with or without assembly instructions, the colorful construction helps to follow sequences, stimulates working memory, and trains analytical thinking skills. The best part is that the marble run builds on an existing system, thus extending its lifespan. All components from the 6-piece hammer strike extension are compatible with common building blocks from other manufacturers, allowing for creative combinations with your existing blocks and themed worlds.