Projects that fit elementary school students, roughly ages 5–10. Every one shows how long it takes, what it costs, what supervision it needs and which variables you are testing.
140 published projects in this collection
Pick something that finishes in one sitting and has an obvious, visible result. An adult should read the safety section first and stay nearby for anything involving heat, and children this age usually need help with the write-up.
Each project page carries an at-a-glance panel with a cost estimate, a realistic time estimate, the hazards involved and whether adult supervision is required, so you can check suitability before any materials are bought.
By subject
By school level
By difficulty
Preparing for a fair? Read the science fair guide or record your data in the lab.