there some of them not stable.. it will slide when we put book or else.. it look simple but creative. also, i think should put a little design or graphic. so, the doesn't look cheap. easy for other people to copy your product from the way i see, this product, not really suitable for the people who have many kids anyway, this is just a comment.
they are different kinds of plywood, ocoume and hardwood. I dont really know of wich wood the top layers are made. i made the choice for this wood mainly because of the costs. Im still a student and even with this material it still cost me 250 euro's.
Well usually companies use either oak or maple. I am going to try to describe it, you'll have to forgive me I haven't been around either species in a while. If you look down the face of a piece of oak you will see small short black lines. This is unique to oak I think. I have only dealt with oak, walnut, cherry, maple and white pine. so I am not sure if one of the other 200,000 species of wood have similar characteristics. If memory serves me right Oak has a bit of a dark yellow color. If you go by price I think that oak is usually the cheapest kind out there, but I am not sure I haven't been at the wood shop for a few months.