Pop-up mechanisms: sliders and flaps
Design & Technology · Key Stage 1 · The School
The V-fold trick
Fold a piece of card in half. Cut a small V shape into the fold, not through the whole card. Push the V through to the other side. Open the card. The V now pops forward, away from the page, all by itself.
Decorating your pop-up
Glue a small picture onto the V shape. A flower. A rocket. A face. When the card opens, your picture pops up and forward, towards whoever is opening it. The fold is doing all of the actual work. It looks harder than it is.
A slider that moves side to side
Cut a straight slot in one piece of card. Push a paper strip through the slot from behind. Attach a small picture to the end of the strip. Slide the strip, and the picture slides across, hidden and revealed as it moves.
Building a card with both mechanisms
Make a birthday card with two moving parts. First, a V-fold pop-up cake in the middle, which pops forward when the card opens. Second, a slider at the bottom showing candles: slide the strip and a flame picture appears from behind a hidden slot. Ask an adult for help cutting the slots cleanly, since a wobbly cut can jam the slider or tear the V-fold. Test both mechanisms several times before decorating, so any stuck part gets fixed while it is still easy to fix.
Explaining the trick to someone else
Show your pop-up card to a friend. Explain how the V-fold pushes the picture forward. Explain how the slider moves it side to side. Once you can explain a mechanism clearly, in your own words, you truly understand it, not just made it by copying steps.