That depends on what your toddler will be taking pictures of and if they’ll be recording video as well. Luckily, today memory cards are easy to come by and are much less expensive than they need to be, so it doesn’t hurt to go big here. The more room you give your child to explore, the more they will learn. That also translates to memory for their cameras; no one wants to have to stop to delete a bunch of stuff before they can get back to having fun. Having at least a 16 GB card will ensure your child can take over 2,500 photos or about 200 minutes of HD video before having to delete anything.