This is an interesting mini card that contains a pop put heart. When being opened, the card seemingly does not have a support mechanism for the card. The hidden support works like a hinge, which offers both support and rotation of the heart in two layers.
You will need the following to complete this card:
Card stock (A4, preferably over 200 gsm)
Templates for cutting:
Template 1 (inner card insert and cover): https://goo.gl/LmhnMu
Template 2 (hearts and support): https://goo.gl/txuogE
Follow the video for the full tutorial.