Easy pop-up cards
I think, nowadays everything handmade is slowly getting more popular. Compared to how it was a century ago, we can buy a lot of gifts, but hand made things are more rear and therefore more valuable and convey more emotions now.
There is nothing easier than making your own card, even a pop-up card! In fact it will only take you 20-30 minutes, depends on how fast you draw and what image do you want to pop-up. You will only need to make a 'step' in the middle of the cardboard list and glue your image to it:
The 'step' itself looks like this (cm):