Why didn't any one tell me about this sooner?

I bought this laser light thingy for my cats and they are losing their minds!! Best two dollars I have ever spent!!!!!

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But, I couldn't find one that would stay on without holding the button down and the button is small and hard to hold. Hurts my finger, or thumb.

I always let my cats catch the dot occasionally. Ready to let go of the button as soon as they put a paw over the spot they "caught". Then when they lift the paw, I turn it on again and run it away.