The problem: Flooded farmland in Bangladesh caused by increased rainfall. The challenge: to design and build a model structure that will enable farmers to grow crops even in an area that may become flooded. A fun, hands-on investigation suitable for KS 2-5 (age 7-19) pupils. The challenge can provide a focus for National Science and Engineering Week, be used as a STEM or science club activity, enhance a lesson on floating and sinking, form the basis of an enrichment day, provide an activity for SEAL and PLTS and be the starting point for a range of cross-curricular activities. This activity is accredited by the British Science Association as suitable for pupils working toward a CREST award.