Cushion Obstacle Course

Cushion Obstacle Course! This play hack is a good way to encourage movement and crawling in your little one! It is not necessary to rush your baby into hitting milestones like crawling, but it is great to encourage movement and developing gross motor skills. One fun way to do that is to lay out pillows and cushions on the floor and place toys baby loves on the cushions or around them. You can overlap cushions, place a blanket over them, or even make a fort.

Then, encourage baby to move to get his toys! Movement like wriggling, rolling, scooting, and pushing up are all great for baby. Babies who are already mobile will have fun exploring too! One of the best things you can do for baby is giving him time on the floor to play freely! All activity must be supervised closely.
Check out this article from mamaot.com for more info on helping baby learn to crawl.

Reference for above information.