Many Kids

I want to get my 5 year old nephew interested in some science thinking. I know it’s pretty early, but he is quite inquisitive and I like showing him fun experiments. I’ve shown him some stuff with a gyroscope (which seemed a little advanced), as well as some kitchen science (like growing salt crystals), as well as that coke & mentos thing.
I’ve googled “science for kids” and stuff like that, but haven’t been able to find many good websites. Any recommendations for experiments or websites? Thanks a lot!
Oh, and I have a few red and a few green lasers that I have shown him fun stuff with
Ok, thanks for the ideas!

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