PET bottle microscopes are a useful apparatus for Do-It-Yourself science. However, those currently in use are only\for observation for dry samples. To observe samples suspended in water such as Volvox, I have improved the\microscope called MyMycroscope which is with a spool as the stage and a penlight as the light source. Furthermore,\MyMicroscope was introduced in workshops at science fairs and professional developments. The outcome of\workshop evaluation implies that the MyMicroscope is a good educational toy to make children aware of the\wonders of science.