Put RFID Tags on Everything

Problem: We spend time looking for our valets, switched-off cell phones and, especially, all sort of keys.

Problem solved: put RFID tags on everything and design a simple, low-energy consuming RFID ping transmitter. 

Fire Escape for the Dog Cage

Formulation of the problem: Dogs left in the cage at home cannot escape in case of fire or other disaster.

Problem solved: Install temperature or any other (for instance, smoke) sensor in the self-opening lock of the cage. In case of fire, etc. the lock opens and the dog can escape into surroundings. 

Combating Street Flooding with Flood Water

Problem: Sandbags are heavy, require a lot of manual workforce to deploy and limited in their numbers against the rising flood.

Problem solved: Have the pavement equipped with standard slots for temporary steel rod dam holders. Use waterproof pre-weighted tarp-plastic bags to hold the water pumped from the flood waters through the filters. Use synthetic nets to keep water-filled bags in place.