00629nam a22001457a 4500008004100000020001800041082001000059100001700069245001900086260003300105300002200138440002500160520028600185650001200471130422t        xxu||||| |||| 00| 0 eng d  a9780749686383  aJ 5001 aGibson, Gary  aHearing sounds  aLondonbAladdin Books c2009  a32p., ill., tfig.  afun science projects  aThe fun science projects books introduce children to science by helping them to understand basic concepts and guides the reader in analysing the results of each experiment and then offered ideas for further activities which will reinforce his or her understanding of the principle.  2science