These little traffic lights can do everything that the full-size ones can do: they change automatically from red to amber and then to green, helping you to teach even very young children to stick to the rules. Useful tip for pre-school teachers and parents: the traffic lights can also be operated manually when you are teaching children to do the right thing - perhaps a good lesson for some adults too - and wait for the lights to change to green. , , The traffic lights have been designed to be very stable and the black base, which looks like the ones used for real movable street signs, can even be weighted down and made more stable - simply fill it up with water and the traffic lights will be able to stand up to all the little Bobby Car and balance bike rowdies who lose control of their vehicles. The traffic lights are designed for inside use, but can also be used outside if the weather is fine.