Wasting tapes everyday on their sensors is fun but there's something else more portable. It's Balls, Strings. and Tapes. Get a tennis ball, tie garden ropes around it, around 1.5 m long, use tape to reinforce it. You must use black tapes, else the sensor won't sense it.
The second method is most direct and easy. LMAO you just force yourselves through the gate. That's it!