In addition to cycling on a wire, Foucault's pendulum and other individual favourites, the main exhibition area consists of a variety of themed exhibitions that change every few years.

Foucault's Pendulum

The globe is spinning - and Heureka with it. The metal strips move in front of the pendulum according to the rotation of the Earth.

Which way does the Earth rotate?

The pendulum is freely suspended. It is attached to the ceiling by a ball joint, so it keeps the same direction of oscillation even if the house rotates with the Earth.

Note the difference!

If there were a hinge at the top of the pendulum, the pendulum would rotate with the house.

Tyttö ajaa hymyssä suin Vaijeripörällä Heurekan katon rajassa.

Tightrope cycling

The tightrope bicycle, which moves at a height of around 6.5 metres along the ceiling of the main exhibition area, is a long-standing favourite among Heureka visitors. Tightrope cycling has been at Heureka since 1993. The cycle remains upright on the wire thanks to a 120 kg counterweight. The weight makes it completely safe to ride, despite the slight wobble. The tightrope bicycle is a rare bicycle in that it remains upright even when stationary. The safety net under the pulley allows you to ride without a harness. There is also a denser net under the safety net, which is fitted to protect against falling objects.

Instructions and facts about tightrope cycling

  • Instructions for cycling

    • A maximum of six people are allowed on the upper deck at a time.
    • Only one rider may be on the bike at a time.
    • Ride the bike all the way to the finish.
    • Do not try to get off the bike if it rolls backwards.
    • Do not jump into the net.
    • If you drop something, contact staff.

  • Facts

    • The minimum length limit for a wire wheel is 140 centimetres.
    • The maximum weight limit for the rider is 110 kg.
    • The height of the cable wheel is 6.5 metres.
    • The travel distance is approximately 20 metres.
    • The counterweight attached to the wheel is 120 kg.