Playing around with educational apps on smart devices is a great way to learn new things, but you can also learn a lot by building things. UGEARS has mechanical models you can assemble without glue. It is releasing a model locomotive you can assemble with your hands easily. You get instructions and all the parts needed to get started.
This beautiful machine is made of wood materials. It comes with a tender that connects with an easy click. Makes a fun toy for kids and geeks in your life.