Last year I saw these felt envelopes at Pottery Barn Kids so of course I knocked it off my own way.
The night before my husband and I had our own little craft night making cards for our girls. They enjoyed it so much that I feel like we need make this a long running tradition. Then when they're grown they can see an accumulation of love notes from their mom and dad.
These are aprox. 9" x 7" white felt envelopes with pink puffy heart closures. Lined with pink printed cotton fabrics. I also used gold thread. These were quickly done, and a bit sloppy but they're cute and good for the job at hand.