Carson was Harry Potter (glasses he got from THIS awesome party).
Devon was Ron Weasley:
And Little Miss Bailey was Hermione Granger:
With this Harry Potter lego sitting on the top of my sewing machine…
… I used Simplicity pattern 5512 as a guide for these 3 costumes. 
I sewed on an elastic hair-band to secure the robe closed, with two buttons on either side. 
We went with some favorite friends trick-or-treating and the kids had a blast. They’ve never got so much candy! My favorite part was hearing them yell Happy Halloween to everyone as they were leaving. I also loved watching them run from house to house. Bailey was especially excited which is the first time for her that she’s really enjoyed it.
What amazing costumes you made – and a place to hold the wand! Wow you thought of everything. I love all the photos too. What a fun halloween for your kids.