Jack Adaptor - for converting switches

Switches are usually fitted with a large  ( 6.3 mm - 1/4 inch ) or small ( 3.5 mm 1/8 inch ) jack plug.

This adapter can be used to change the the jack plug type from small to large 

Carefully look at the toy and note the type of jack socket you require. Here is a little guide

If you have a toy with a large jack socket and want to plug in a switch with a small plug this is the part you require