1, homemade soap paper
White paper with good water absorption, small pieces of soap, writing brush and disposable beverage cans are needed. First, cut the soap into pieces, put it in a jar, put a proper amount of water, heat the cup on the stove, and when the soap melts, cut the white paper into the size of a matchbox, apply soap solution one by one, and then take it out and dry it in the shade to make soap paper.
2. homemade hot air balloon
Soft paper, 6-8 leaf-shaped paper, glue and adhesive tape are needed. Cut out 6-8 leaf-shaped pieces of paper with soft paper, fold them in half, stick the edges together to make a balloon, stick four connecting wires to the bottom of the balloon with adhesive tape, fix the other end of the wire on the table with plasticine, adjust the speed of the hair dryer very slowly, aim the hair dryer upward at the opening at the bottom, and turn on the switch. The balloon will get bigger, tighten the thread and leave the table.
Step 3 make your own windmill
Need scissors, long bamboo sticks, glue, waste beverage bottles. First, cut the beverage bottle in half, leaving the top half of the bottle for later use. Then take out the small motor and rotor from the waste toys and install the rotor on the motor.
Poke a small hole from the bottle cap with scissors, insert the motor shaft into the hole and fix the motor. Cut the bamboo stick to a suitable length and fix it on the bottle cap with glue, so that the windmill blades form a 90-degree angle. Finally, connect the battery to the motor and the windmill can turn.
4, homemade flashlight
You need a small LED bulb, a small lithium battery, some wires and a simple circuit board. First, fix the LED bulb on the circuit board and connect the lead to the circuit board. Then use a small lithium battery as the power supply, connect the wires to the battery, so that the current can pass through the circuit board and LED bulbs. Finally, put the whole device in a small plastic box, and the flashlight is finished.
5, homemade maglev train
You need a magnet, a small motor, a battery box, a shaft sleeve and glue. First, fix the magnet and motor on the shaft sleeve, then insert the shaft sleeve into the battery box and fix it with glue. Turn on the power switch of the battery box, and the motor will start to rotate, attracting the magnet on the shaft sleeve to the motor, so that the maglev train can move in suspension.