It always amazes me how my 6-month old son's arms, that can't be over twelve inches long, can reach things within five feet away! He is able to sit up now. The world around him is just one big distraction, especially when I'm trying to feed him with a spoon and I'm chasing his little head around.
I remember always having to push everything to the other end of the table when my other son was a baby. None of this is new to me. It just seems funny how their arms and legs can be so small, yet can reach so far and run so fast.