What kindergarten handicraft classes have you collected for your children?

Table tennis chases the wind, blows in front, and it actually runs behind. Preparation materials: 4 pencils, 1 blowpipe, 1 table tennis. Assemble four pencils into a track, and ensure that the track is in a horizontal state. Put the ping-pong ball on the edge of the runway. Select a straw and blow continuously at a distance of 1 cm from the front of table tennis to observe the movement of table tennis. Through the above experiments, we found that table tennis does not roll back after continuous blowing in front of it. On the contrary, the table tennis is close to the blowing position and begins to roll.