The felt pieces have an adhesive back so I just peeled off the paper and stuck them to a blue card base. I then hand cut some grass out of green card stock and glued it in front of the eggs.
The rainbow and clouds are made from an MFT die, but you could very easily hand cut your own rainbow and clouds too. If I didn't have the die, I'd cut a rainbow out of white paper and use markers to create the different colors.
I finished the card with a sentiment stamp, but again, if you don't have stamps, just hand write it!