I will chime in to support all those who are saying that you should support her interest in STEM, have her engage in different STEM ECs, including summer programs like those if Northwestern or Johns Hopkins.
Your daughter wants to study science? That’s excellent. Do your best to provide her with the best opportunities to explore science, and engage in activities related to science.
However, it is, like everybody says here, way to early to think about which college she should attend, or even what she will do at the end.
Here is a reality check - it is unlikely that your daughter will attend an Ivy League university. That is simply a fact of college applications today - the vast majority of the top academically performing students who apply to Ivy League colleges are rejected. So to spend her next 5 years on plans for something which is highly unlikely is not the best use of your time, money, and energy.
You and your child should be focused on creating the best plan for her to succeed and thrive in high school. THAT should be the goal of your planning, not admission to colleges with very low acceptance rates.
Your kid is in 7th grade, and is going through enormous physical, emotional, and mental upheaval. It is likely difficult enough for her to simply get through the week or even day, and perform well in school, without adding the burden of expectations that she will achieve something that is unlikely, at best.
Making college plans for a 7th grader not only puts unneeded pressure and adds unneeded anxiety in the life of a kid in the middle of puberty, but is also an exercise in futility. You are making plans for a person you do not know yet, based on a person who is in the middle of major changes.
Your kid is going through, or will go through, a process in which her amygdala will grow, while her prefrontal cortex will not, and her entire brain will rewire. That is besides the fact that her body is growing and maturing. It is similar to the process that happens in toddlers, but with a kid who is much larger, and knows where you hide the alcohol.
Between her seventh grade and the time she started college, my daughter went through so many dramatic changes in her life and personality, that I look at what we were thinking in 7th grade and what is happening now, and I can only shake my head.
In middle school, my daughter was a shy girl who avoided the spotlight, and who was highly engaged in math and robotics - multiple math competitions and awards, robotics competitions and awards, etc. However, in HS her ECs were dance, LGBTQ and anti gun violence activism, and stuff related to performing arts. A large part of her classes were studio and creative arts, and her HS awards were for writing, activism, and dance. She was also outspoken, a leader, and was gender non-conforming.
Ask yourself “what does my daughter need NOW, and for the next few years?”, not “what will help my daughter be accepted to this or that college in five years?”
PS. my daughter is happily majoring in neuroscience now, something in which she had no interest in 7th grade.