1, homemade colored candles: find a canned beverage barrel, cut off the lid, cut the wax into the barrel, put the barrel in hot water, stir the wax inside and melt it. First, put the thread used as the candle core into a container, then pour the molten liquid into a container with beautiful shape, let the original wax cool, and then pour the molten colored crayon liquid into it, so that different colors of wax can be added layer by layer.

2. Self-made badminton: cut off the upper part of the empty beverage bottle, divide the cut part into eight parts, cut each part to the bottleneck with scissors, cut each part into petal shapes with the same size, cover the bottle with a foam fruit net, and fix it at the bottleneck with a rubber band.

Wrap a glass marble with another foam fruit net, plug it into the bottle mouth, plug it tightly to expose about 1 cm, cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands. After beautification, a self-made badminton maker can make what he likes.

3. Self-made coin jar: cut the cardboard into a rectangle with a length of 10 cm and a width of 5.5 cm, and cut a small mouth with a length of 2.5 cm and a width of 1 cm in the middle of the rectangle with a circumference of 3.5 cm in the rest of the rectangle.

Cut out a rectangle with a length of 32 cm and a width of 6 cm from the plastic sheet and divide it into 6 cm, 10 cm, 6 cm and 10 cm. From the second part, a rectangle with a length of 10 cm and a width of 8 cm will be extended from left to right, and the remaining three parts will be left with proper adhesive surfaces, so that the modification can be made by ourselves.

More creative inventions are as follows:

When learning mathematics, we often use rulers, compasses and so on. The general pencil case is relatively small, so it can't hold a lot of stationery, and the plastic ruler is easy to break. It is suggested that the stationery factory change the dual-purpose compasses into three-purpose compasses. In other words, the feet of the compasses are made thin and straight, and the length is engraved. In this way, compasses can be used to draw circles and parallel lines, and can also be used as rulers.