At Christmas and sometimes on my birthday, my uncle (with the help of my parents) would give me the much-loved "helicopter ride", telling me that a little imagination was needed.
My uncle would blindfold me, check that I couldn't see at all, and help me to stand on a chair "step up into the helicopter", and tell me to put my hands on the shoulders of my parents standing beside me. I would be told "we're taking off", feel the chair being lifted up, and my parents' shoulders moving down. I would then hear a commentary "there are fields and tiny houses below you, we're flying over the sea, we're so high, we're touching the sky..." and I'd feel my head touching the ceiling; I believed I really was flying! I was then told that if I was brave, I could do a parachute jump to come down, and jump off the chair. I did this, and it really felt like a long way down!
Because my eyes were covered, I couldn't see how it was really done, but I did find out later. The chair wasn't lifted very high, but my parents would crouch down, so I'd feel their shoulders moving down, making it feel like I was going a lot higher. The ceiling was actually a book lowered on to my head. And when I jumped off the chair, it was actually on the ground, but felt like it was much higher!