For any female American readers, there are loads of STEM Summer Camps near you! From spending a week using NASA equipment on Space Camp in Kansas to spending two weeks hiking, camping, exploring ecosystems and investigating environmental issues at Earth Camp in Arizona or learning about the physics of sport in Ohio, there are a huge range of different areas of science to explore - you could easily spend your entire summer going from one camp to the next!
A great list of camps with more details is available on this website.