DIY Flashlight

DIY Water level indicator

DIY Buzzer game

DIY Creative alarm

DIY door open alarm

CD Hand crank generator

DIY Flashlight type-2

DIY Rain detector model

DIY Electromagnet experiment

DIY continuity tester

DIY water level alarm

DIY superbright keychain light

Note: These are DIY experiment ideas, You may need to arrange some tools and material at your own. The shown Batteries / components may be different from the material you have in your kit.