I am very easily persuaded to make tutorials so in the future don't be afraid to ask. For the making of a rock baby you will need a smooth stone, preferably swaddled baby shape, some crochet cotton , a crochet hook ( I used a 5 mm hook ) , a yarn needle, scissors and either black paint and a fine paint brush or a fine permanent marker works as well. You will need to be able to make a chain , join it and be able to do single crochet in a circular manner. If you don't have those skills any beginner crochet book should be able to explain them to you. Start by making a chain of 3 stitches in length and then join them to form a very small circle.
In each chain stitch make a single crochet. That is your first row. On the next 3 or 4 rows depending on the width of your stone make 2 single crochet stitches in each stitch , doubling the number of stitches on each row. When you think you have the correct width, remembering that you want it to be stretched tightly on the rock stop increasing.
Now you will continue to make only one single crochet in each stitch keeping the same number of stitches per row until you have reached the correct length. I slipped the net onto the rock every one and a while to check the length. I wanted the finished length to be about two thirds on the length of the stone.
I hope you make a rock baby and please send me a picture if you do. I would really enjoy seeing the family grow.