How do I make a baby shower gift out of diapers ?

Here's one idea for you! https://www.hometalk.com/diy/craft/party-decor/easy-diaper-cake-37379445

Easy Diaper Cake

There are tons of videos on YouTube. Check them out

I used to love making diaper cakes. Place the larger diapers on end around an object like a new sheet, shirt, or light blanket for baby. place a tall object in the middle if you want to make it like 3 layers high. I used a tightly rolled receiving blanket there. Secure the bottom row of diapers around the rolled receiving blanket with a large rubber band, continue the second row and make it smaller with newborn size diapers. Secure with a large rubber band. Finish the top layer with rolled up t shirts or bibs for baby to make smallest layer on top. I usually stick a toy or two like a rattle on top for the decor. Then cover each rubber band with wide ribbon. Use the colors of the gifts on top or the gifted person's favorite color for the choice of ribbon. Here is an example of one done with a John Deere theme for farmer friend's new baby shower:

I have a diaper bike tutorial you can follow over here: https://happydealhappyday.com/diy-diaper-tricycle-tutorial-baby-shower-gift-best-step-step-guide-make/

It was so much fun to make!!