Babies grow and develop when they are ready. If you have expectations and compare your child to others it will become unhealthy for you.

Babies crawl anywhere from 5 months - 11 months. they first roll over between 3 and 5 months and start walking between 8 and 15 months.

Just because a baby doesn’t walk until 15 months doesn’t mean that child won’t be a smart child. Everyone has their strong points and weak points.

you can’t change their genetics.
you can talk to them, read to them, play games with them.

Are you kidding??? It has been determined that babies soak up more knowledge daily than most adults could in months. They are constantly learning! Every day is a million new things for them. Their mind grows at an exponential rate.
The best thing you can do for your child is to allow him/her to mature and grow at the rate they naturally do!!!

Wow - stop putting so much pressure on yourself and on your poor kid! If you push your kid, she’ll probably regress and do stuff slower.

As for crawling and talking, the best way for your baby to learn is to give her plenty of tummy and floor time and just talk to her with words (no baby talk). My daughter rolled over at 4 months and rolled both ways at 5 months and is just now beginning to crawl at 7 1/2 months (she’s at the get-up-on-hands-and-knees-to-rock-back-and-forth phase).

Despite claims made by products promising you a smarter baby, your baby will do things when she is ready and not a moment sooner. So sit back and relax and just let her development on her own terms. If you ever get worried about her development, talk to her pediatrician, but don’t set out to make your baby the ultimate smart kid. That’s just way too much pressure.

The best way is stimulation but not to much as they may become bored, however walking, talking and crawling faster than other children will not necessarily mean your child will be smart, you may be disappointed. Children grow and learn in their own time, forcing things upon them may discourage them so be patient and let your little one learn and discover at his own pace.

my definition of smart is a child with excellence in these categories:
verbal proficiency
creativity
analytical skill
stick-to-it-iveness
ambition
inquisitiveness
crawling isn’t on my list, but talking surely is. I love being a parent, and providing smart activities is a lot of fun. My kids started talking and signing by their first birthday and using sentences by 18 months. If they don’t actually talk young, that is OKAY, just keep giving them the vocabulary through books and you talking, when they start to talk they will catch up quickly. When they have earaches, be sure to talk directly into their ears and read a bit more because they aren’t hearing well and it affects verbal development.

How to enrich your babies life!
Don’t let them watch TV unless you are doing it together and interacting with your baby. Your baby’s brain develops the most during sleep so do everything you can to have great sleep habits for your baby. Perhaps while your baby is so young and you have a bit of time you could read the book Healthy Sleep Habits, Happy Baby. You will learn more than you ever wanted to know about sleep and its impact on brain development and it will benefit your child throughout his or her life.

verbal: read books (start now), describe everything your baby shows interest in to give them more vocabulary (start now), teach your baby to sign, start about 8 months old, teach your baby to read start about 2 1/2 years old* before they learn the ABC’s so its easier. I take my kids to the park and other peoples homes often and encourage them to interact with the other kids, I think the more people and the more situations they have to interact in the quicker their social abilities will develop. I’ve had LOTS of people comment on how smart, confident and outgoing my children are from very young ages.

creativity: when they start to talk, encourage them to play games using their imagination, let them test out ideas instead of just saying that won’t work

analytical: when your baby starts to grab things put things just far enough away that she had to figure out how to get it, when she crawls give her obstacles to figure out how to get over, don’t hover around solving her problems, let her figure out things for herself each and every day.

stick-to-it-iveness: have your child learn a musical instrument (start around age 6) or play sports (ages 5-6), these both provide opportunities to fail a lot and then try again (ie shooting hoops, or learning a new piece on the piano). For your baby get wood BLOCKS–building towers again and again is great, it also teaches colors, shapes, cause and effect, and blocks draw adults and older children in to play with baby for social growth..

ambition: teach your child to set goals, start as young as they can understand.

inquisitiveness: answer all your child’s questions, but don’t spoon-feed, you can answer with questions that lead to more questions and cause your child to reason out the answers for themselves.

If you want to try baby-track potty training that is a lot of fun and could be started now, research elimination communication on the internet or read the Diaper Free Baby.

Ok. Babies start learning in the womb. You can’t make your child crawl faster. It’s a developmental thing that they will achieve when they are good and ready, or they won’t. It has nothing to do with intelligence. Plenty of perfectly intelligent kids never crawl. Plenty of perfectly intelligent kids crawl later than other kids, because they haven’t felt the need to learn it yet. The best way to encourage your child to talk, is to talk to them. You can’t make your child develop faster, but you can provide a good environment so they can. If you don’t talk to your kid, they won’t talk either. If you keep your kid in a swing all day, they won’t have the chance to crawl.
*This is important* Pushing your child will delay them, not make them smarter. Encourage, sure, but don’t push.

I think my daughter started crawling when she was about 9 months. I can’t remember. She said her first word with the correct meaning at 7 1/2 months.

If you want to make your kid smarter in a way that won’t hurt them, teach them another language. If you don’t speak anything else, find some sign language resources and learn that.