For the creativity of the person building, mostly to let the builder use different sizes of pieces in their creations. It also is used in sets if it is needed.
The answer depends on the size of the Lego pieces.
Use your brain and think what you want to make with LEGOs.
Lego is made by melting plastic and molting it into many different Lego pieces
Get a bunch of legos
The price really depends on the types of pieces you buy and who you are buying them from.
Yes, pieces of Lego are made from plastic materials.
although it depends on the size of the legos, because they all differ there is about roughly 180 regular sized lego pieces to each single pound. but again it is hard to say because the variation in lego piece size.
There is no exact value. Since Lego bricks are all different in size and weight, there would be no right answer to your question.
"I used to play with LEGO pieces as a child."
Although you can, the paint may not stay on and the pieces may not fit properly in again.
A key rack can be made out of Lego's by building a wall type structure with the legos. Then make a hook with the legos that sticks out and is sturdy enough and the right size for the keys.
When you purchase Harry Potter Legos, try to find all of the sets instead of just one or two. There are different buildings and characters involved in the Lego sets that if you don't get them all, you are missing out on the collection. The details of the Legos are amazing. Most of the characters can be used on any of the sets. The Legos are small, so you need to make sure young children don't put the pieces in their mouth.