One of my two kittens constanly chatters at toys. He gets this crazy look in his eyes and his tail starts moving weirdly. I'm not sure he knows it's just a toy Is it normal? My other kitten plays with the toys too but never chatters at anything.

Georgie chatters all the time when she is in hunt mode. Especially if she can see birds outside our house, but her little toy mousey gets hunting sounds too! She was even chattering at small snowflakes when I left this morning. It's so funny! She makes a sort of clacking sound, like when humans click their tongue against the roof of their mouth (hard to explain without sound!).

Ohhh good, so my Tim isn't the only one I mean I've heard of cats chattering before but I've never actually seen it and we've had a ton of cats already, It's really a funny noise

Georgie also plays fetch with tied up crisp packets. She will actually bring it back to us and wait for us to throw it again. Ahh cats, so amusing at times

What I love about cats is how unique they are, each has its very own characteristics and traits
Here I just uploaded a video of my Tim chattering, does your Georgie do something like that?
Tim chattering - YouTube

Seb does this when he's watching the birds from the window and when he's playing with his favourite mouse and his ping pong balls

I think he's going to be a bit of a hunter when he goes out, just as long as he doesn't bring me presents

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Yep my cat chatters at lights and shadows and does the flicky swayey tail thing.

Your Tim is gorgeous Seb does exactly that

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Oh my goodness,that is exactly the same noise. Makes me chuckle so much.

Can you imagine putting them in the same room and playing, lolol all the chatter sounds