Is this for teaching Physics and English is not your first language?
Steve
Is this for teaching Physics and English is not your first language?
Steve
Keep it below 5mw in power otherwise your children could be claiming for eye damage from a stray point (you should avoid pointing at them in any case even with 5mw but accidents happen and at least 5mw is considered to be usually safe). You also need to consider the laws in your country to check that even 5mw is allowed. In the UK I think the recommended power on pointers is now 1mw, although I don't think the limit is not mandatory.
Also, as Marc said above, choose green as its the most visible colour for any given power.
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Well, I would recommend you the 'DinoFire Laser Pointer' because i personally used it and is pretty awesome. you can check more best laser pointers for presentations.
wouldn't a key chain laser or pet laser work for this? there under 5mw extremely low cost, available every were including dollar stores and for the price you can supply every kid in class with one so they can focus your attention on there point and matter making safety your main concern.