Do a search for “girls science camp” and your area. You’ll find everything from Microsoft computer science camp for girls only to local science and tech programs for homeschoolers.
Thank you!
Another thought: The university near us does “Engineering Day” in both March or April and October. They have activities from building water towers out of Popsicle sticks to bottle rockets powered by baking soda to marshmallow and toothpick bridges, along with q&a sessions with engineers, short lessons on different fields of engineering and tours of the college. These activities are free, and both my son and my daughter enjoy them.
And look for local colleges doing math related activities on Pi day, 3/14.