The short hand is the minute hand. The long curved hand sweeps out the hours. The current hour is at the position where the curved hand intersects the vertical hour numbers. A sticker on the box says it was designed and made in the UK by Robert Darwen www.ideasintime.co.uk.

This specimen came from Boron, California. It is called TV Rock because, if you place it over an image, the image appears to be at the top of the rock, as on a TV screen. The fibers of Ulexite act as optical fibers, transmitting light along their lengths by internal reflection. Much more detailed information can be found on the web.

It is called TV Selenite because, if you place it over an image, the image appears to be at the top of the rock, as on a TV screen. The fibres of the selenite act as optical fibres, transmitting light along their lengths by internal reflection. Lots of detailed information can be found on the web.

If you enjoy scientific curiosities, it is well worth adding this to your collection. Place the ball bearings and magnet on the green ramp as shown, with one ball bearing at the top of the ramp. As this top ball rolls slowly down the ramp, when it gets close to the strong magnet it is attracted and rapidly speeds up. This happens so close to the magnet that the effect is not visible. However, the ball is now travelling at high speed and, as it impacts the magnet, the ball bearing at the end of the row is shot off at huge speed in a very surprising way.

The spinning top can be used for playing four games. This is a good example of a turn of the century game that exploits electronics and modern design to appeal to children. Copyright 2003 Nextoy LLC. Distributed under licence from itoy Inc.

The clown’s head and body contain a ball bearing. The figure will tumble down a slope if it is at a suitable angle. The figure is made from cloth and cardboard.