This is a fun little trick that I left me kicking myself for not thinking of it sooner. It provides a good few minutes entertainment when well executed (depending on the materials used - you will see what I mean) and potentially minutes more, if you do what I did and taught the little trick to previously tricked sibling (to stop them crying actually) and then send them off to get another hapless victim of their own.

All you need to pull this one off, and give yourself at least minutes and minutes of entertainment is a bright torch, as well as some kind of semi hard object, such as an orange, tennis ball or even an egg.

Call the 'victim' on, and lob the orange / ball / egg towards them so that they move towards it to catch it. Now, for best results, lob the item high, at least one to two feet higher than their head, so that it begins to drop at around head height.

Then, once they are in position - looking up at the item in flight - simply shine the torch in their eyes. They will be momentarily blinded, leaving the orange / ball / egg free to hit them nicely and forcefully in the head.

Minutes of fun. Just beware, if you take a page from my book, and hit your 7 year old sister in the head with a relatively hard orange, it might take a while to stop them crying. Your call though.