Here’s the costume I made for my son a year ago. Am a slooooow poster. Am posting just in time for this halloween. As a starting point I re-used a fleece pyjama I had made for his sister, but you could use any shop bought one. I added a hood with felt teeth and eyes, and added a strip down the back which ended as a tail, all studded with points. Then I cut out disks in a contrasting colour and sewed them on randomly.
Not sure if he’s a monster or a dragon, anyhow, he loved his looks.
I made the costumee a month early, silly me. He grew so much I had to add a gusset between legs, and new feet 😛
atelier in the attic 
what a cutie! 🙂 both the outfit and the boy look amazing! 🙂 well done Mama!
Brilliant! All babies should have an outfit like this
Your post gave me the needed push to post mine, thank you for that.
Oh my! This is precious!