What milestones do you want to capture? Most often 3-4 months is for rolling over, 6-8 months is sitting up, 12 months is cake smash for their first birthday, 18 month for walking, then each year for their birthday after. However, this is completely up to you and what you’re wanting to document for your child. Many love to have their entire first year so that they’re able to create either an album or a gallery wall at the end of year. It’s a great way to look back on such a huge year!