First off, every part is present. You will notice in the picture that the finish line has a small piece broken off, but it does not hinder any play. The GraviTrax Starter Set Marble Run Stem Toy by Ravensburger is a versatile and engaging toy suitable for all ages, with a focus on STEM principles. Made of plastic and metal, this set allows children to explore gravity and physics through creating their own marble run systems. With the option to expand with PLUS PLUS branded components, this builder set offers endless possibilities for creativity and learning. Designed for ages 8 and up, this toy is a great way to spark an interest in science and problem-solving in a fun and interactive way.