One way is to remove one side of the crib with a screwdriver and attach a premade guardrail in its place.
													
																	Cot that turns into double bed. 
									
	
		
	
																	If your child s starting to outgrow their crib you can turn it into a toddler bed in a couple of hours. 
																	We have a double bed that i would like to turn into a massive cot for our 9 month old. 
																	Visually this turns the bed sideways and into a daybed. 
																	You could easily place an old door behind the bed to create a low visual backrest. 
															
													
									
	
		
	
																	The backrest could be as simple as a wooden door. 
																	I would like to effectively have a cot style side rail and end rail which is say 1 meter tall just like a cot so that he cant climb over it he climbs over everything. 
																	If the guardrail is about 2 3 of the bed s length your child can get in and out of bed on their own while having a barrier to stop. 
																	I am certain someone can come up with a way to turn your old cot into a double bed headboard. 
															
													
									
	
		
	
																	Then center the bed under the cot. 
																	A standard door is 80 inches tall which when placed on its side is only 5 inches wider than the 75 inch twin sized bed. 
																	There are walls along 2 sides so i need to blank off the other 2 sides. 
																	This would be of course after cleaning thoroughly. 
															
													
									
	
		
	
																	Pottery barn have designed a bed that converts from a cot to a double bed the bed comes with extra attachments that will last a child into their teens the three in one convertible cot is made of.