Old Children’s Musical toys (Colchester CO1)

I work for a local organisation that runs free music and sound workshops. We are looking for old music children’s toys, e.g. small toy keyboards or other instruments, or toys that make sound, e.g. similar to the pictures above. It will be for an upcoming workshop where we will be taking them apart and bending the circuits to make new sounds. If anyone has an old one they can spare, it would be much appreciated! Thank you