Fascinating and educational! This is perfect for inquisitive (older) kids and also includes some interactive elements to keep them entertained. Located inside the US Patent and Trademark office. Appropriate age range will depend on your child, but generally for an older age.

link to website

Tues-Fri: 11am – 5pm
Saturday: 11am – 3pm
Closed Sunday, Monday and Federal holidays

Got an inventor in your family? Check out their Invention Project too, a great way to inspire young kids to put their ideas out there.

Free Indoor Educational