I use this on the last day, usually Friday, of the first week of school. The children love wearing the hat. Hint: stringing the necklace works faster if you affix scotch tape to the end of the yarn, wound tightly around the yarn end. Stringing cereal pieces onto the yarn is much easier this way.
The hats can be cut ahead of time if your students aren't proficient at using scissors yet.
Printing out the hats on heavy paper or tag board is nice but not necessary. The hats can be taped onto sentence strip tag board or construction paper. Gently wrap the hat/sentence strip around the child's head. Tape the ends together.