• plastic
• instrument--characteristic and with educational design simple and generous in design, smooth in lines​, sensory
• Thinking training for --perfect your , it's funny and interesting also, this is a nice teaching tools for preschool,wood sensory
• music instruments--increase parent- interaction, brain development, ability to , observation,auditory sensory
• learning --using one of the wooden boxes, sort the receiver in order of sound from strong to weak or weak to strong, instruments
• Sound tubes--this auditory comes with a compact size, making it easy for to hold and play, learning