Right next to the Atomium is the model park Mini Europe. Recently updated and refreshed it is still a very cute place to visit especially with kids. 

Mini-Europe is a park featuring all the wonders of Europe, in miniature [...] with 350 monuments [...] at scale 1/25. Thousands of lifelike figurines and animations! 

(From the website)

https://www.minieurope.com/en/the-park/

Photo credit Netha Hussain on Wikimedia Commons