I'm reaching out for some creative suggestions. I have a 4-year-old and a 7-year-old attending preschool/school, and both sets of teachers have asked for ideas from parents for skills they could show or projects they could help with in the classroom.

I have a background in computer science, primarily focused on web development these days. Additionally, I have loads of potentially useful toys at home, including a 3D printer, DIY CNC mill, webcams, Raspberry Pis, old laptops, etc.

What are some engaging activities or projects I could bring to either level of the schools that would be both fun and educational for the kids? Particularly ideas we could do as a class vs breaking into smaller groups.

I have had a couple of ideas so far - Processing based art interactive which the kids can suggest updates for and instantly see the changes. - Something RTLSDR based, so we can play with antennas and catch some radio waves.

Looking forward to your creative ideas and suggestions, thank you.