More often parents tend to buy extendable beds for their toddlers, due to the lack of space in their houses.
They are great in terms of space because we can fit a bed in any small room we have in our houses but often they do not show the intention of the extention.
Often the way the beds are placed do not give the idea there is space to expand the bed at all.
A good advantage of extendable beds is that the body heat disperse less easily rather than the big bed and they feel cozy.
One cons is that if not placed properly they might create issues.
They might create fear of falling anytime because a short bed is also a narrow bed, approx 70 cm. It is a standard size but maybe not for a child who likes to move a lot during sleeping time.
The solution are endless but what is important is that when choosing a bed you open a dialogue between you, yourself and your child.
The concept is quite easy to understand if we think to a plant: the bigger is the vase the dipper the roots will grow. Vice versa the smaller is the vase, the smaller the plant.