Since there's nothing that can match the sound of little kids laughing like mental patients (hey, Da-da does it), here's this. Mix any of the following words with the below sub-list and watch what happens.
1. UNDERPANTS (or PANTS)
The above three (i've omitted BOOGER and some of the more nefarious words) usually draw a cheap snicker, but the real silliness is in combining them with the below sub-list -- or anything nonsensical -- the combination of which sends Small Beings into Paroxysm Land. So, in no certain order:
10. SQUIRREL (e.g., SQUIRREL UNDERPANTS)
9. RUTABAGA ("RUTABAGA TRANSPORT" is also good, esp. as a Midwest band name)
8. SUCCOTASH (say it with great conviction and relax: it's just lima beans and corn)
5. VAMPIREPANTS (no idea why this got a laugh)
To reiterate, add BUTT, POOP, PANTS or UNDERPANTS to any of the above, say them with a funny voice, and you've got the makings of a guaranteed knock-out kindergarten graduation speech. Make a song of it and you've gone preschooler platinum. These words can also occasionally STOP tantrums, as Small Brains will LOCK and CENTER on anything ridiculous, if only for a moment. (Kinda like Monty Python's, "Confuse a Cat.")
Of course, the social earthquake word UNDERPANTS (from the German olio of, "UNTER-DAS-PANTS-HEIL" and "SUPERAFFENGEIL") stands alone as the consistent laugh-getter, across all alien 3-6YO demographics. UNDERPANTS are just funny, Giotto. Like Chevy Chase calling out the ghost town bartender, "HEY, UNDERPANTS!" (though note that that was mostly funny because the bartender then mock-blew Chevy away with a double-barrel shotgun). You might as well enjoy this brief tyke apercus of mirth, because by the time they're 8, they'll be wearing all black with black shoe polish around their eyes and then NOTHING'S FUNNY ANYMORE -- except Da-da falling down the stairs, which is always funny. So, strike while the iron's on top of the chicken.
Images courtesy of one of Da-da's favorite sites, Archie McPhee. And the plug's for free, hee hee.
By the way, speaking of subnomenclature chicken, you geeks might enjoy playing with The Torpoleximatic, seen here in it's corruptible mortal state.