Let's look at the sentence:
"The toy shop has shiny cars, building blocks, pretty dolls, fun storybooks, bouncy balls and magical unicorns. It’s a happy place where kids’ wishes come true!"
It's mostly perfect! It lists all the fun toys the shop has. Just one tiny thing: when listing items, it's good to use a comma before the last one to make it clearer. So, add a comma after "bouncy balls".
The corrected sentence is:
The toy shop has shiny cars, building blocks, pretty dolls, fun storybooks, bouncy balls, and magical unicorns. It’s a happy place where kids’ wishes come true!
This little comma is called the Oxford comma, and it helps make lists easier to read. Otherwise, everything else is great! The grammar and punctuation are all correct.