It’s a shame that the very thing that makes a toy attractive is the one thing you can’t advertise: the danger factor. If the makers of lawn darts had been allowed to write on the packaging, “The toy that could kill you if you use it wrong!” then nearly every kid in the world would be begging for a set. So it was with the simple, seemingly harmless 70′s toy called Click Clacks (or, depending on where you grew up, Knockers, Knocker Bockers, Clackers, Ka-Bangers, Knicker Knackers, etc.). Had they worked only as the toymakers intended-as a noisy little twist on paddleball games-then Click Clacks might now be collecting dust in the Hall of Forgotten Toys. But no, these little spheres had a grander destiny: the much cooler Hall of Dangerous Toys.
The Click Clack design was like the answer to a Zen riddle: two orbs attached by a common string. By holding the middle of the string and moving their hands in a constant up-and-down motion, kids caused the thick glass spheres to collide at the top and bottom. Aside from looking great (especially if the balls were speckled inside with glitter), the toy made a highly satisfying clacking noise that you controlled. Many a parent was driven to profanity by this hellish metronome, but that was only the start of the Click Clacks’ problems.
If you don’t know the story, right now you’re probably thinking, “pinched fingers.” And you’re halfway right. Those spheres could deliver a mighty whack to the untrained hand. But that was totally your own fault for being such a lame-oid with your Click Clacks, doofus. The real danger was a hidden one, at least until you managed to smack your Click Clacks together long enough and hard enough. When that critical breaking point was reached, those thick glass balls would shatter, sending Click Clack shrapnel flying. Usually, the spheres were chipped away a little at a time, but if you were on the wrong end of a surprise shattering, boy, were you in for a dandy treat.
Not surprisingly, just when Click Clacks got interesting, they were taken away. The toy went out of production, moving forever into the realm of schoolyard rumor and urban legend. Click Clacks did make a comeback in later decades in a safer (in other words, more boring) form, but the days of explosive, noisy fun were gone forever.
If your childhood the 70s included playing with these infamous toys, if you ever got bonked on the head by one of them, or if your beloved Click-Clacks ever caused bodily harm to those around you, these are all stories we’d like to hear at Retroland. Share your experiences in our comments section as we remember these unforgettable noisemakers.


I got sent to the principals office for bringing mine to school in the 2nd grade. My family hadn’t heard about the dangers of Clackers (as they were called in Reno, NV at the time) yet. I thought I would be so cool if I showed up at recess with mine. I was cool for about 5 minutes before I was whisked away, Clackers still warm from a furious round of clacking, by my teacher to the principals office. There I got a lecture on the danger I was putting myself and my classmates in. I didn’t get into any real trouble but was told I had to leave my Clackers in the principals office till the end of the day. It actually worked out for me as I got way more “street cred” by getting sent to the principal than I got by bringing Clackers to recess. Of course when I got home I had to see if the exploding action was true. My brother and I spent all afternoon trying various techniques to recreate the shattering effect. Lets just say hammers and bricks were involved. Luckily we didn’t get hurt and in the end they just kind of cracked and crumbled.
That’s a great story. Thanks for sharing!
Still have two pairs. What I remember most were the bruises all over my forearm from my less-experienced ker-banger days. They were also a pretty effective weapon in a sibling battle. I was usually the victor, as evidenced by the fact I still have mine AND my sister’s. Lol!
Best part is tossing them at someones legs if they’re running… So easy to cheat in tag. lol
OMG! My wrist still hurts from those darn balls coming down and hitting me. I am telling my kids all about them and getting so animated! Those were cool, but crazy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Yes,I remember having many bruises on my arms from that dang toy! I not only remember my clackers, I have a set now that I got off Ebay a while back. The ones I got off Ebay were original from the 70′s, still in the package. I use them once in a while, but I don’t want to use them too much and have them shatter.
I remember playing with those bad boys back home in Albania in 1997 or 98. We use to try and see who use to be the best by seeing who use to get the Clackers to bang the fastest. The quicker you were the faster and louder the clackers banged the more street credit you got in the neighbourhood. I remember being really good and getting the clackers to bank really fast tiki-tiki tiki-tiki tiki-tiki tiki-tiki. Some guys were really really good.
I was wondering where i could buy some cheap decent ones? If anybody knows could they write on here please and maybe leave a site i could go on and buy some Bad boy Clackers! Thank you!
My father Peter Mitchell was the inventor so we were the first kids to have as well as slip and slide and water wiggle
That is soooooo cooool !
I am old enough to remember the early 90′s revival of Clackers. Loved them. Such a simple, low tech toy that provided so much amusement.
I first encountered them in the early 90s. The ones I had weren’t glass though, they were some kind of hard plastic/resin material, possibly the same stuff they use for bowling balls.
Later they started making the “safe” version, where they replaced the string with plastic brackets. The new contraption removes all challenge from the toy, making it pretty useless & boring.
Yeah, I had the “safe” version of Clackers too, from the 90′s. They did take some skill to clack properly, but probably nothing close to the shattering, bruising, glass version that preceded them.
I still have mine – the original harbingers of hurt from the 70′s. I am looking at them right now. Ah…the memories of bruised elbows and concussions! I still can’t get them to go more than three or four times in a row mainly because I am ducking and covering my face with my left hand and arm while extending my right arm as far as possible away from my body while clacking. Obviously, I still am terrified of them. But they make a great sound!
Maybe I was a knocker prodigy without realizing. No bruises or any damage other then dropping them on my toe once. I could get those suckers in a blur for as long as I could take the noise. We lived out in the country so no complaints from neighbors or family.
I heard they could shatter and sadly try as I might mine didn’t. I still have mine. Hmm just gave me an idea about the next apartment when they blast their music at 3am……
I seem to remember them ending up hanging off of the electric power lines.
I just got a set from the 70s…still in the pkg.!these ones are called Klatterballs, but I remember them as Click-Clackers…they surely ere painful.
I remember having several pairs and several bruises too back in the late 60s and early 70s. Loved them and became quite good at working them. Of course we always had neighborhood competitions to see who could go the longest or the fastest so our whole neighborhood was actually good at it. Gosh, I know now they weren’t safe, but they sure were fun.
We had steam heat radiators in school, which were great for two things: melting crayons, and exploding Klackers!
I can’t belive that people have enough time to be researching such minutia. But, while I’m at it I would like to mention the carpal tunnel sysndrome I developed from the rubicks cube and the sea monkies that I raised that grew up to bite me….