I used this project at the end of ELEducation, Second Grade, Unit 4, BUT you can use it at the end of any butterfly unit.
The students are responsible for creating a butterfly garden that will help keep the butterfly population going. They have to research what flowers butterflies like, the life cycle, how to create a garden, and more. The students also have to decide the perimeter of the garden and would it be big enough to be used as an outdoor classroom.
This project incorporates A LOT of different skills and my students LOVED it.