J.,
My daughter isn't there yet ... she's just 7 and a half months old. But, I have a two and a half year old son, and some of his toys have been unisex that we've bought him ... and they've gone over GREAT with kids of all ages at our playgroups.
One of our favorites is the Leap Frog musical table. Not sure of the exact name ... but it's a learning table with music and lights. It has colors, shapes, a book, and several different "instruments" on it. We got that for our son around that age, but kids in playgroup (and my son) still play with it (ages 1-3). They LOVE it!
Also, we got him the Fisher Price dinosaur with balls. You put the balls in it and it makes noises and comes down different ramps. We got it for him for his first birthday, and again, all the kids STILL play with it during playgroup (even 3 year olds!) ... it's been one of the FAVORITES for all the kids playing over here (and it's just $25 I think).
He loved anything musical (would also be great for a girl), and anything with balls, blocks, etc. And, all those type toys really grow with them, too ... which is always nice! We've really enjoyed the Leap Frog line of toys ... they've really helped my son learn his numbers and letters.
Good luck and happy birthday to your sweetie!