Not sure if this is the right forum at all but maybe you guys might have something. Basically, I need to stick and object that is thrown to another stationary object. But the object thrown needs to be able to be taken off. So far there is velcro to velcro and we have an object which is magnetic and a magnet as the background. I've googled around for another suitable material but can't seem to find one. I have thought of possibly using electromagnets and enable them at certain times. But i'm not sure how this will work with detecting the objects that are being thrown. Not really sure if I can use different types of magnets with different strengths or whatever. Any Ideas or input would be great. Cheers guys.