IEEE Website on ‘Try Engineering’ for Youth: There is a huge amount of information on this Website, including explanations of what engineers do, teacher lesson plans for high school and grade school, links for students to engineering schools and FAQs about engineering, information for parents, online games, robotic competitions, STEM related camps, etc. A very extensive resource.
STEM and Maker Space for Youth: There are scores of these facilities across the U.S. Search on “STEM workshops” or “maker spaces for youth”. A few are listed below:
New York State Network for Youth Success. This site has a lot of resources. Their offices are in Brooklyn and Troy NY.
STEM Education Center and Maker Space, Natick MA
STEM Center USA. Run by two sisters with degrees in mechanical engineering, they offer many resources including summer camps.