Every one of us some, sometime in our life played with a boomerang. What is amazing is that we throw it and it comes back . Every single time.

The video selected by me for this day is how to make a boomerang from an ordinary can. I think it will be very fun for kids because they can play with it. The principle is simple: it is related to energy conservation.

It is not something very complicated and hard to make. It is so simple . All you need is a little rubber and something heavy. Check out the video for more details.