Preschool Science Fair Projects

Our Preschool Science Fair Projects collection offers playful, curiosity-driven ideas for children roughly ages 3–5 to explore the world like tiny scientists. Homeschoolers, afterschooling families, and caregivers will find vetted, secular projects that focus on observing, comparing, and talking about what happens rather than formal experiments. Kids might watch seeds sprout, mix colors, play with ice and water, or explore magnets under close supervision. Each idea is reviewed for safety, simplicity, and developmental fit, with adaptations for ADHD, autism, sensory sensitivities, or 2e learners. Use the filters to sort by topic (plants, water, color, movement), mess level, and time required. If you’re unsure how to participate in a “science fair” with a preschooler in a way that feels age-appropriate and fun, Modulo’s AI learning concierge can suggest gentle project ideas and simple ways to share them with friends or family.