Science & Technology
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1000 Inventions and Discoveries
Sold by Roger Bridgman
Original price was: $5.00.$2.50Current price is: $2.50.
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Electronics for Kids: Play with Simple Circuits and Experiment with Electricity!
Sold by Øyvind Nydal Dahl
Original price was: $19.99.$9.99Current price is: $9.99.