I tried this project with a two year old today...BIG hit. We taped it to the floor first, but then used masking tape to tape it to a window. He really enjoyed the effect of painting with the light showing through. We used Q-tips or fingers for drawing utensils. I recommend this project as an alternative to finger painting because 1) it's less messy and 2) most toddlers I've worked with do not like the feeling of getting paint on their fingers.