Happy Jack Butterfly Bailisong flip knife Butterfly Blade 4.5

This knife is a bali designed from older, larger Pariaso blades.  The simple Philippine design has a tooled aircraft cast handle, medium weight. The clip blade is  made from 440 stainless, sharp with groove.  Butterfly is 10" long with a 4.5" blade. Has a spring handle lock and the blade has blood holes and grooves. Qu

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Happy Jack Butterfly Bailisong flip knife Butterfly Blade 4.5 blade –

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My 13 year old son wants to buy a butterfly practice/training knife. What are some good reasons not to allow him to get one? I've checked, and these knives are legal in