For this interesting activity on observing how plants move, I used the plants that I already have outside. I noticed with one of my plants - as it was noon - was leaning its way upward towards the sun. The items I replaced was the window, in which I used a trash bin and measured the plant between the bin and the leaf closest to the bin. The activity is well organized and detailed with in-depth pictures. Make sure to treat the plants carefully especially when using the toothpick to track its movement. This activity is simple, organized, and can be easily improvised with limited supplies to make it an outdoor activity. Overall, the quality of the content is in-depth and user friendly for all elementary students.