Rahmi M. Koç Museum is a great place to learn about the history of communications, transport, and industry. It's located on the shores of the Golden Horn and showcases research and engineering objects used throughout history. Items on display here are from around the world, and visitors will learn interesting tidbits about this rich subject. The museum has a tearoom, shop, pub, and restaurant on site.
The Istanbul Military Museum is one of the best of its kind in the world, and it showcases the proud military history of Turkey. The museum has thousands of artifacts from the Ottoman empire as well as exhibits which are more recent. Walking along the various exhibits, visitors can see the evolution of the military from the grand weapons of the Ottoman empire to the progressively sleeker and more deadly weapons from World War I and the times that followed.
The İstanbul Toy Museum is a huge toy museum that includes artifacts from around the world. Some of the most striking exhibits include a French violin, American dolls, tin toys, porcelain dolls and other European toys. Usually visited by kids and their parents, it is a must visit for those who love to pamper the child within them. Check their website for details.