Objective: This work proposes the use of computer simulation and Javascript programming language to design a low-cost virtual laboratory within an interactive learning environment. The objective is to provide learners with a realistic and immersive platform to understand scientific principles in various fields of science. Theoretical framework: The research methodology involves a step-by-step approach to designing a computerized learning program. The process emphasizes defining goals, selecting content, and organizing frames in a sequence from easy to difficult. Method: Qadisiyah University in Iraq designed and implemented the virtual laboratory at the Faculty of Education. It supports the physics curriculum for sixth-grade learners and offers two practical activities accessible on internet-enabled devices. Results and conclusion: The virtual laboratory implementation enhance the physics curriculum for sixth-grade learners. Its interactive and immersive nature engages students in scientific exploration and understanding. Through computer simulations and virtual activities, learners actively participate in scientific phenomena and develop a deeper comprehension of scientific principles. Implications of the research: Virtual laboratories open new horizons for sustainable education, training learners in scientific principles across multiple fields. Integrating virtual laboratories into the learning environment provides a cost-effective way to enhance science education. The research highlights the benefits of computer simulations and virtual activities in fostering scientific learning. Originality/value: This work contributes to education by demonstrating a practical application of computer simulation and programming language in designing a low-cost virtual laboratory. The findings inform educators, curriculum developers, and educational technology practitioners on utilizing virtual laboratories to enhance science education.