When I first started making cards I only used punches so these are are a throw back to that idea. I found the triangle fold tutorial on the a stamping journey (https://astampingjourney.wordpress.com/2018/12/19/wednesdays-wow-50-creating-a-pyramid-card-and-maybe-a-giveaway/amp/)
She has a really nice tutorial on how to make the card fold. I then just got my old punches out and created some fun Easter punch art to add on the front of the card. Also I bought from Amazon self adhesive mini Velcro dots to hold the two sides together when completed. This way you can fold them in half to mail. You don't need to use the entire Velcro dot just cut then in half or a quarter to add to the card they are plenty strong.
I found them so fun to make I have lots of them now to mail. I think these are so easy to make kids could try making them.