They experiment to see if their ideas make sense. So do children. Science skills are used in everyday life. When you observe, compare, sort, experiment, record or share information, you are practicing science skills. A child arranging leaves by shape is using the same thinking process a scientist uses to sequence genes of a human cell.
Science is information about things and how they work.
Although science is more than just facts, science knowledge helps us build on our discoveries and understand things that happen each day. What a good way to begin science. Learn something about the toy, the way the toy is put together, the ingenuity of the people devising it. Encourage your children to read, too. Not just what they have to read for class or work, but to learn from the wisdom and joys and mistakes of others.