I bought three pieces for 2.50€. The compass does not work on any whistle. The thermometers have deviation and show wrong, 2-2.5 degrees, because each needle is stuck incorrectly in the plastic. The magnifying glass strains your eyes. As a whistle, it is weak, with very low and weak sound, compared to other ones from the kiosk, which whistle incredibly with 1€ and you can hear them from kilometers away...