Space Science
Why Does the Moon Appear to Change Shape? A Lamp‑and‑Ball Model Demonstration
A simple lamp‑and‑ball model lets children see why the Moon looks different each night. By holding a ball in a lamp’s light and turning…
MEET A CURIOUS MIND
Discoveries by Luca Hartmann
Explore this author’s published science guides and ideas.
Everyday materials Clear explanations Room to wonder
Plants & Living Things
Observation Journal Project: Watching Seeds Grow
Children plant seeds, record daily changes in a simple journal, and learn how roots, stems, and leaves develop. The activity uses everyday items and…
Physics
Choosing the Right Units for Your Science Project Measurements
Learn how to pick appropriate measurement units and convert them correctly with a hands‑on demonstration using everyday materials.
Physics
Which Paper Structure Best Protects a Clay Ball in a Short Drop?
Children test four paper constructions—flat sheet, origami cup, honey‑comb panel, and corrugated tube—to see which shape absorbs impact energy best and keeps a clay…
Physics
Colored Shadows Demonstration – A Low‑Mess Activity for Small Classrooms
Create vivid colored shadows using paper, transparent colored sheets, and a simple light source. This low‑mess demonstration lets students see how light, color filters,…
Plants & Living Things
How Does Light Direction Affect Seedling Growth?
Explore how seedlings bend toward a light source by setting up a simple experiment that compares unilateral, overhead, and dark conditions. Measure curvature over…
Physics
How Does String Length Affect a Pendulum’s Swing Time?
This experiment lets children discover that a longer pendulum swings more slowly. By measuring the period for different string lengths, they see the relationship…
Physics
How to Label Graph Axes for a Science Project
A clear graph title and correctly labelled axes turn raw numbers into a story. Plot the independent variable on the horizontal axis, the dependent…
Chemistry & Materials
Build a Reusable Bottle Water Filter – An Engineering Challenge for Kids
Design and construct a simple water filter using a recycled plastic bottle and everyday materials. Kids learn about filtration, engineering design, and how to…