The pupils in P4/5 were involved in various sound experiments in these pictures. One group made bottle chimes. They were exploring how sound changes with different levels of water in bottles when you strike the bottles. Another group were making glasses sing by wetting the rim of the glasses and using the correct pressure, making the glasses vibrate by rubbing around the rims. This produces a high pitched noise. Others were involved in making water whistles to  investigate how the pitch of the sound varies as they blow into a straw and raise and lower the straw.