An avid gardener living in the sunny Dominican Republic, Mariana is stumped by a change in her new plant. The plant once grew delicious berries, but now Mariana can't seem to get any more berries to grow.
With the help of Mariana's Tia (Auntie) Leti, an agricultural engineer, Mariana soon discovers the problem: her plant is not well-matched to its new surroundings, and lacks a pollinator. How will Mariana solve this difficulty? With Tia Leti helping her explore the challenges of maintaining balance in natural systems, as well as introducing her to the engineering design process, Mariana soon discovers the sweet rewards of agricultural engineering.
Readers are encouraged to design and improve their own hand pollinators. With some creativity and knowledge of the engineering design process, everyone can engineer!