Carnival through English

During the second week of my school placement, the school is getting ready for Carnival. I'll help the English teacher to organize the costums of 1st and 2nd grade.  My purpose will be to guide pupils during the costumes' creation through English. I have started to focus these six sessions and I am deciding some aspects: 

1. The most important vocabulary:
   - Costumes (flowers, owls, rangers, squirrels, witches and wizards, elves, bears and fairies)
   - Materials (cardboard, scissors, glue, coloured paper...)
   - Verbs (cut, colour, stick...)
2. The methodology that I am going to use:
   - Some posters with pictures
   - A guide with the steps that pupils need to follow
   - Compliment vocabulary: Amazing, fantastic, that sounds good, bravo, congratulations, nice work
    
3. More aspects to take into account:
   - Groups: Each carnival group is composed with 15 pupils more or less
   - Organization: They will be working two groups each day (so two different costumes per day)
   - Time: They are 6 groups, so there are three lessons of two hours.
   - Resources: Before starting, we have to create patterns of each compliment, in order to make sure that it is okay, to show it to the students and to offer them some help.