Simple Floor Plans ***How Do I Use My P.c To Make A VERY Simple 'FLOOR PLAN' For My Kids Bedroom/furniture?***?

***How do I use my p.c to make a VERY simple 'FLOOR PLAN' for my kids bedroom/furniture?***? - simple floor plans

Hello, I decorate my bedroom 2 children Clock (common), and I'm looking forward to new furniture / bed, etc..
I wonder if there an easy way to, make an airplane cm / inch to see if I chose the furniture in shape and play with the design?
I have found in google, but flat complex planners have no idea how much to use, you must buy.
Is there a simple way that I could do that? I do not want to print or presentations, etc. lol
Thank you to everyone who can help xxx