Meet the FT Sea Otter: a DIY water plane made from a water-resistant foam board that can move over water and fly in the air. The kit includes almost every component you need to build your own plane. You can optionally get a Lumenier 2250mAh 3s 35c Lipo Battery for it. The below video shows how the FT Sea Otter works:
DIY Foam Board Seaplane - FT Sea Otter | Flite Test
The above video shows this seaplane in action.
[Source]
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.