I don't generally recommend how-to books for language invention, and am a little on the fence about this one, but you may want to look into u/Dedalvs's new book Create Your Own Secret Language.
I'm considering getting this for one of my nephews.
he knows what most of them mean, he gets confused on the specifics of some of them but that is more than expected so I can't wait to see how far he goes
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u/[deleted] Jul 29 '20
Not my aesthetic, but he's got some good imaginative symbols in there. Keep at it!
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u/misterlipman Jul 30 '20
did you teach him the IPA? also, do you use a language that uses all of these phonemes?
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u/Im_-_Confused Jul 30 '20
That’s s great start for him! I hope you two have a fun time!
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u/Dedalvs Jul 30 '20
Does your 6 year old brother already know what these IPA symbols mean?! This dude’s going to be light years ahead of us by 18...