  2000 - Experimenting with Forces [Experimenting With...Series] (Paperback) ISBN-13: 9781552440322 ISBN-10: 155244032X ?  2000 - Experimenting W/ Light Colour [Experimenting With...Series] (Paperback) ISBN-13: 9781552440360 ISBN-10: 1552440362 ?  Simple Machines [Experimenting With...Series] (Paperback) ISBN-13: 9781552440384 ISBN-10: 1552440389 ? |
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