Material: suppose there are 10 balloons and 10 micro-resistors, the resistance value is100Ω, and the power is 1/32w (note that the power cannot be large).
A cord as thick as a toothpick is long enough.
12v-7AH battery.
10 detonate the button switch.
1, wires are welded at both ends of the resistor. Stick the resistor on the inflated balloon with transparent tape.
2. Connect one of the two wires of resistors on all balloons to a bus and pull it to the detonation site. Then connect the other wire of all resistors to the critical point. Thus, the initiation point is 10+ 1 wires.
3. One end of the button switch is connected to the positive electrode of the battery in parallel; The other end of the switch is connected to the 10 lead; The balloon bus is connected to the negative pole of the battery.
Press which switch, and the balloon will explode later. The specific time can be experimented by yourself.
The principle is that the switch current is connected, and the balloon bursts and explodes through the resistance heating.