The book contains two hundred different experiments in the natural sciences for children under 12 years of age. On their own or with friends, and sometimes with the help of adults, performing these simple but exciting experiments, children will be able to take their first steps in science. Clear instructions with drawings are given. Experiments are safe, do not require special equipment and materials, can be performed both at home and at school. The book contains five sections: astronomy, biology, chemistry, earth sciences, physics.