Switched on :  non-fiction graded readers  : level 3. 

 - England :  Hamilton House,  2019. 
 - 28 p.  colour pictures ;  23 cm. 
<br/><br/><label>ISBN: </label>9789925313211 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nature.--Earth.--Physical.--Electricity.--English Language.
<br/><br/><label>Dewey Class. No.: </label>537 SWI