Drinking Perpetual Motion The Original Vintage Retro Magic Sippy Dipping Bird A Science Wonder Bulk, Set of 2

It is a part of history ;(now reborn) , all ages love to see it swing perpetually with no batteries needed (just water )

These were given to my yoga classmates as Mr. Drinking Bird is the perfect "show" of the forward bend, hip points forward and head and spine in line!..They LOVED him...and will be using him as a demo in their classes...(as well as a wonderful fun for their young children to see and experience!!!)...A huge success for all involved!!!

this thing is amazing - after about eight years of physics in high school and college and thoroughly understanding why perpetual motion is impossible - well this little bird will keep drinking forever with no additional energy input once started. The only thing that stops it is when the water evaporates out of the glass. I know, I know - it uses the water essentially as "fuel" and since it does not "make" enough water to compensate for the loss it is not truly perpetual motion. But it is still really cool.

I set one up on the kitchen counter as soon as they arrived and it's been dunking it's head and drinking for a solid three weeks now! Yes, they still work and look just like they did when you were little and had one and they are just as fascinating!You can adjust the balance point of the bird to accommodate different drinking heights.

I was totally jazzed when I saw these I used to watch these four hours when I was a little kid so I bought them so then my grandson today have the same enjoyment the only reason I gave it one star is that the only way I could submit a report in all reality it's 100 times 0 was very very very very disappointed neither one of them worked as they should one barely works at all the other one slow down and stop every 5 minutes things are junk and like I said I'm very very saddened and disappointed!!!