Include thermometers both inside and outside. The object of this center is for students to have an opportunity to make observations about plants and their growth. They can water them and observe what works best for plants. The plants should be put in the sun and in the shade as well. There should be a lab book for observations to be recorded in.
Clean mud is made of toilet paper, water and borax.
Week two should have either lots of seeds or some rich soil in it. All of these things will be messy, but a teacher should be prepared to keep things clean. Add some music with rain to the listening center. Also, add a rain stick to the musical instruments. The students will make rain gages the first day of the unit, and they will set one up outside.