Arianna loves observing the grass grow indoors - and watching the changes over time. This is a great way to introduce your kid to basic knowledge about seeds & plants - and what seeds need to grow - water, soil, and sunlight. When your kid asks how the grass grows, you can explain how the roots absorb water and nutrients from the soil - how rain often provides enough water for grass to survive - and how most grasses need 4 to 5 hours of sunlight a day to survive. Your kid can pick the perfect sunny spot for their grass tray to be placed - we picked a sunny spot by the window. Watering the grass daily with a spray bottle will give your child a sense of responsibility and pride as they watch it grow.