Wonderopolis is a great website to go to. It has a lot of wonders that kids will like and think about. It has questions like "why is grass green?" or "why do dogs eat homework?". There is over 1100 wonders on this page or maybe more!
This wonder is pretty cool, it talks about how colours I see may be different to the colours that you see. For example, your red might be my blue or your green might be my yellow.
Heres the link to the website:
If you don't understand here's an e.g.if i see a red ballon in the sky you might see it but in a different colur like blue or black or orange
HOPE YOU VIST WONDEROPOLIS
THANKS BHARAT AND DHIREN