Flight experiments give you instant, measurable feedback: pump, launch, measure, adjust. These projects cover water rockets, chemical rockets, balloon-powered vehicles and paper aircraft — all built from bottles, card and balloons, all built around a repeatable measurement.
7 published projects in this collection
Outdoors, wind is your biggest uncontrolled variable, so launch on calm days and alternate between your test conditions rather than finishing one first. For water rockets, water volume and nozzle size interact — change one at a time or you won't know which caused the difference.
Measure height indirectly if you need to: time aloft with a stopwatch, or compare against a building or pole of known height. Three trials per setting is the minimum; five is better.
A materials list with costs, numbered steps, safety guidance, the variables to change and control, and a data table you can fill in — plus community results from other builders once people start sharing theirs.
By subject
By school level
By difficulty
Preparing for a fair? Read the science fair guide or record your data in the lab.
They are drawn from the whole library by topic, across every subject and school level, so the collection mixes quick afternoon tests with full science fair entries. Each project page states its subject, level and difficulty.
A research question and hypothesis, the independent and dependent variables, the variables to hold constant, a full materials list with costs, numbered steps, safety guidance and a data table you can fill in as you test.
It varies, so every project page states a cost estimate and a realistic time estimate up front. You can rule a project in or out before buying anything.
Some do. Every project lists its hazards and whether adult supervision is required in an at-a-glance panel on its page, so you can check suitability before you start.