Even better than an actual tie is if the tie is stitched onto the onesie.
veryKIKI makes adorable clothes for your future A student.
I love this Short Sleeve Bodysuit with Necktie Applique ($13). There are long sleeve versions, too, and they come in many colors and sizes, up to 18 months.
My husband just yelled at me for not buying H-Junior anything after a splurge for my little girl. I think this will make up for it.
Ties on baby boys -- don't you just love the look?