There is a technique which claims to help your baby crawl earlier (should you wish him or her to). In essence the technique makes your baby more tolerable to stomach lying. Step one place your baby on his or her stomach on a carpet on the floor.
Step two gently hold your baby by the elbows and encourage supporting him or herself on elbows. Continue to provide support.
Step three measure, or try to get some measure of the distance between the floor and your baby's armpit in the supported position.
Step four get a roller with approximately the same diameter as you've just measured. Rollers are soft cylindrical shaped toys, preferably firm. The roller should be placed underneath your baby's upper body for support. It is important that you do not buy the roller too big. Your baby's elbows must still reach the floor when lying over the roller.
Step five put the roller underneath your baby's upper body with elbows touching the ground in front of the roller. This supported position also allows your baby to lift his or her head and discover the surroundings.
Step six get down on the floor directly in front of your baby, face towards your baby. Now let your baby look at your face while you talk to, amuse and encourage your baby to lift his head and take part in the conversation.
Step seven step six is the most important step of this activity. And your baby will surely endure longer sessions and crawl sooner if it is enjoyable. Remember, your baby should focus on you and naturally develop a sense of using both legs for support. In no time you will see your baby supporting the upper body on straight arms and bearing weight on both knees ready to crawl.
Spend three to five minutes daily, results will come even faster if you can do more than one session per day.