One of the trickiest things about being a parent is that your kids are constantly evolving and changing. For instance, while it seems like you're just getting into the groove of sleeping, there is almost always a wrench thrown into it like a sleep regression. One of the wrenches that a lot of parents phase is moving their child from a crib to a toddler bed. To help make the transition a little bit easier, there are three things for you to keep in mind
1. The Mattress
Crib mattresses are notorious for being extra firm so that they prevent things like Sudden Infant Death Syndrome. Because your child is so used to sleeping on a hard mattress, you don't want to get them a new mattress that is really plush because it may make the adjustment a lot harder. Instead, choose a mattress that's still on the firm side so that when they sleep at night, they still almost feel like they are in their crib. And remember that if they want a softer mattress later on that you can always add a plush mattress pad to it instead.
2. Getting a Low Bed
Toddler beds are primarily made so that they sit lower to the ground which makes it much easier for kids to get in and out of bed on their own, and it also makes it less of a risk if they were to fall out of their bed. If you want to get a regular mattress though, then consider just placing it directly on the ground instead of on a box spring until they are full sleep trained and you don't have to worry as much about them falling out.
3. Getting Some Rails
One of the scariest things for parents making this transition is the lack of support to keep their toddler contained. Look for a bed that has built-in rails to keep them from falling out, or consider buying separate rails that you can attach to just about any bed or mattress. These rails will not only prevent them from falling out of bed at night, but they will also give you the peace of mind that your kid is okay.
One thing to keep in mind when transitioning your child from a crib to a toddler bed is that they may or may not be ready to make the move. If they are still sleeping safely and soundly in a crib, then you may want to keep them in there until they are a little bit older.