Today I chose a random theme using https://www.randomlists.com/random-words and added the modifier of "3d prints" to it - I want to come up with 3d printed products.
tiny modular boat as child toy - you have a basic case and can add objects, fisherman etc. as you like (maybe Lego-compatible)
Toy for adults: little rowboat with mechanism to move the paddles
Contest: who can make a boat go the fastest/longest? All parts must solely work with 3d printing.
Little "boat garden" for cress, to swim inside glass bowl -> sponge inside soaks up automatically with new water
Make custom 3d printed "waterpark" with channels for boats to swim in
little ocean diorama: Print ocean floor with beautiful corals -> fill up with transparent resin -> add boat to top part
On longer sail boat trips, use battery/generator powered 3d printer to quickly fix broken parts/for little repairs; note: must be very manageable, as there is not much room on board, also potential fire hazard -> optimize printer or use on bit larger ships
3d print and sell boat in bottles with great detail and few manual work
swimming boat in water bowl, which has an uneven surface on the bottom for underwater plants to grow on and move with the boat
Collect plastic part in oceans and find a way to use them for 3d printing
