They are exceptionally rare

The Green Science Salt Powered Robot construction kit will help them learn about mechanical and robotic science and what makes up different types of energy and battery power

and will also be of value to researchers

Additionally

Animal Kingdom - Torch Projector exhibition They are exceptionally rareExplore animals and their habitats through the magic of light projection with this Animal Kingdom torch projector Each kit comes with 3 colour coded, interchangeable discs for a total of 24 animals in their natural environment. Shine on your wall or ceiling and make bedtime and story telling fun, as the animals light up a room. Shine the torch projector on your wall or ceiling to project animal images up to 90cm wide. Includes a key chain, so you can