Part of my child astrology series.
When I think of Geminis, I think of curious little chatterboxes. They were born to explore and learn and experiment. They are alert very early on, perhaps even from day one! Unlike little centaurs who are on a quest for knowledge, the twin wants to discover, well.... just because. And, unless they have a reserved sign in Mercury, they do a lot of that exploring through talking, and talking some more.
This is the baby that will want lots of stimulating objects. A handful of 'good quality' toys isn't going to satisfy this little one's curiosity. She wants, no, craves, variety. She needs to see new faces and places as well as objects.
However, the little twins don't simply require 'stuff' or disconnected newness, they need interaction. Baby DVDS are not going to provide that. She'll love to hear you talk, sing and recite rhymes. She'll also enjoys hand and feet games.
She's an inquisitive and enthusiastic little person. You won't need to rouse her to become interested in anything, she's there ahead of you. The worst environment you could provide for a Gemini is one that lacked the freedom to explore or follow her own learning whims. Provide many books, textures, and situations. You'll need to be a place of calm for her as her nerves can become easily rattled and over-taxed.
The little twin will likely adore being carried. This gives her maximum interaction and involvement. She will do very well with baby signing - not just learning quickly, but because she desires to communicate so much, it will minimise frustration when she lacks words.