The Write and Learn Creative Center developed by VTech is a fun and interactive device. This product, #80-169300, is designed to develop writing and learning skills for children between 3 and 6 years of age .
It sounds like there's a loose connection between the speaker and the circuit board. This may mean that you'll need to re-solder the connections between the two. Use this replacement guide to learn how to access these connections. Hope this helps!