STEM for Kids: Build Machines is an educational app developed by Tappity Inc. It is available for iPhone users and falls under the category of Education & Reference. With this app, children can learn all about machines through interactive lessons.

The app features Haley, a child-friendly science teacher, who guides kids through dozens of interactive lessons. Children can build their own rockets, conduct real science experiments, answer trivia questions, and much more. The app offers a 100% interactive and narrated experience, allowing kids to learn by reading, listening, and touching.

One of the standout features of STEM for Kids: Build Machines is that it aligns with the Next Generation Science Standards (NGSS). This ensures that children are learning real science concepts while having fun. The app also includes science trivia quizzes to test their knowledge.

Parents and kids appreciate Tappity apps for several reasons. Firstly, they get to interact with a real person, Haley, who serves as a science expert. Secondly, the app provides a safe environment with no third-party advertisements. Additionally, the app can be played offline, making it perfect for long waits or travel. The app offers a free trial with no trials or extended subscriptions, and in-app purchases are available for unlocking all of the app's content.