Please don't assume that I lock my kids away from society simply because I homeschool them. I am a music teacher for a homeschool co-op that meets twice a week for 3 hours (it has 69 kids, including mine) where they get gym class, music class, friendship time, and art class. Plus, they attend once weekly story time at the library for 2 hours and attend church school once weekly for 2 hours. My kids are socialized to the max.
Now, regarding pushing my sons... The reason we started them on the instruments was because THEY asked to play with us. We started with little drums (kiddie bodhrans, tom toms, bongos, etc...) and only progressed to guitar and piano because they wanted "to play with Mommy and Daddy." I don't need to tell any of you with kids how you know what your kids want. Most frequently, they tell you- often, loudly, urgently and repeatedly. By the bye, my husband never picked up any instrument at all until 15 yrs of age and he is a brilliant guitarist, pianist, drummer and (yes, I mean it) tuba player. He's pretty darned good at the fiddle, bass fiddle and guitar and bodhran as well. So he is a living testament to the ability to pick up and master instruments in adulthood.
About the second language? Way ahead of you there. I'm bilingual and have spoken to my children in both French and English since birth. Additionally, I'm pretty capable with ASL, so my kids hands have been getting lots of dexterity practice since they were tiny wee bairns.
I knew there was some danger in getting preached at in posting this thread. Forgive me if I sound defensive, but we homeschoolers can catch a lot of ideological flack.