How much stronger is Earth’s gravity compared to Mars and the Moon?

The moon exerts a gravitational force with an intensity equal to 1/6 of that of the earth.

Gravity on Mars is about two times stronger than moon’s one, thus equal to 1/3 of Earth’s gravitational pull.

To make things less abstract, just look at the image below. On the left is shown the height reached from a child thrown by a person on earth.

Considering that the father always throws the kid with the same amount of force, and that the mass of the child does not vary, the height reached in the center and on the right, is how high the child would get, if he were thrown, respectively, on Mars and on the Moon.