I found out this useful websites for kids its for early learning and having fun while they learn most lovable one for me is ABCmouse and national geographic for kids.
5- ABCmouse.com Early Learning Academy is a subscription-based online education program for children ages 2–7 www.abcmouse.com/
1- National geographic for kids its really fun website allow kids to watch videos and play games and more :)
kids.nationalgeographic.com/
2-NASA for kids if they love the space and want to know more this is the place
3-If they wonder how things work or why the sky id blue and this kind of questions this website will be good for them (how stuff works )
4-Curious world for early learning and prepare the child for school its nice one