... 's voice with funny pictures, ideal choice for children's pre-school educationMaterials: 4C printing 128gsm art paper, 1, 000gsm ... long time duration. Operation: turn on the sound Button, the pre-recorded sounds can be heard when pressing the relative pictures,at ... .Customized sizes, sound and printings are welcome Function:For pre-school education of children, enrich children's knowledge and enhance ...