In this house we have plenty of colours in different pens. These were enough for my needs now. I started to make Easter cards for my personal use. It is very simply idea. When I use stamps for card making I stamp the pictures before and let them dry for a good time; meaning weeks or months. :) Then when it is time to make the cards I color the stamped pictures and "build up" the cards.
These stamps are old and I have used them before in Easter cards but that is just fine. Again the result looks different. It is just the fact that despite the stamps are the same you can mix them and make the back grounds different.