Posted before but price has dropped again, Quite a few in stock round ilford/ romford area.
National Geographic Water Pump.
Perfect for any budding designer, this National Geographic Water Pump is a great fun and educational toy.
•Create a working pump by wiring up all the plastic parts.
•The water is carried upwards using the Archimedes screw principle, it pours down into the base and is then pumped up again, fascinating.
•Includes instruction manual.
•Batteries required: 2 x AA (not included).
•For ages 8 years and over.