Everyone probably at least once burned his tongue when he ate hot food (this can happen when you are in a hurry or just don’t want to wait for it to cool down). I propose to build an interesting plug (you can also use a spoon) with cooling.
A motor, a button, a screw, insulating tape, wires, a soldering iron, a battery.
Take the screw (I took the spare from RC Helicopter) and attach it to the motor.
Simple Automatic Controller
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Paper model of the tank VK 1602 Leopard
How to make a pony out of clay
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Simple flasher on NE555 timer
Wedding box for money or rings
Baked apples with cottage cheese