3. The various pictures of Gemini mostly show them as children close together:

In this example (by Flamsteed) Castor holds an arrow in his left hand and Pollux has in his right hand a club similar to that which Orion often is depicted to carry.

In the (important) center of the picture is an instrument with 6 strings. A string instrument is evidently a necessary part of Gemini, see for instance:

(Ignace-Gaston Pardies, Globi Coelestis, 1674, according to Linda Hall's site.)