Snail or Turtle?

I have been trying to give Eva tummy time to help her learn to crawl.  Well, Eva can roll over from her tummy to her back.  So sometimes it is a fruitless effort and she just ends up playing on her back.  Today I put her on her tummy and she moved like a snail, slowly advancing across the floor.  She is making progress!   She could beat a snail, but probably not a turtle.