This study is designed to understand how to facilitate children's conceptual growth about plants using digital technology. Fifteen 4 and 5 year old children were interviewed to identify their understandings about plant growth and reproduction. Misunderstandings include representations of origins of plants and relations between seeds and plants. A digital toy plant was then used to challenge these representations. Difficulties in understanding focused on transitions in growth, aspects of the digital display design, and whether to begin with the plant or the seed.