16 Mechanical Projects:

Density tower

Spectroscope

Ping pong ball fountain

Egg parachute challenge

Magnetic compass

Slingshot catapult

Camp stove challenge

Clothes peg pistol

Model seesaw

Stomp rocket

Fountain in a bottle

Periscope

Falling ball viscometer

Kite

Weighing scales

Counterweight trebuchet

14 Electrical Projects:

Push switch

Doorbell circuit

Two way switch

Series & parallel lighting circuits

Upstairs/downstairs lighting circuit

Fan

Wire a model house

Coin battery

Electroplating bath

Electromagnet

Solar powered boat

Water/air turbine

Mini hydrogen plant

Motor