My Little Pony Costume Diy . Following the directions in the link above, sew the front and back of the pants together and hem the bottoms. 5 out of 5 stars. Pin on Halloween from www.pinterest.com Other useful things to have on hand are fabric glue, paper and a marker. Halloween costume, tutu costume, birthday dress, my little pony tutu dress, twilight sparkle costume, prettyposhtutus. Making my little pony toddler costumes.