It's an example of 'centrifugal' motion, the way things fly out of a circle if there's nothing to hold them in. Your chance to build some bridges, test their strength, and try to work out what keeps them up. Water circuit Move the water round the exhibit using the pump, bucket lift, siphon and Archimedes' screw. Yes, it's just a climbing frame, but based on the famous 'spiral helix' of the DNA molecule. Copying the code Find how the pieces pair off in this giant model of DNA replication.
Gene replication Turn the disc to show how parents genes can combine at random in their children.