Sound Ideas, WHISTLE, SLIDE - SLIDE DOWN, SLOW

This sound effect can be found on the Series 1000 Sound Effects Library, which was made by Sound Ideas.

Clean, Full Length and Unedited Link to the Sound Effect

The Backyardigans (Heard once in "Race to the Tower of Power".)
Between the Lions
The Cat in the Hat Knows a Lot About That! (Heard once in "A Plan for Sand", "Tree's Company" and "The Rain Game".)
Doki (Heard once in "Doki Digs to China".)
Eena Meena Deeka
Hermie and Friends (Heard once in "Stanley the Stinkbug Goes to Camp".)
Higglytown Heroes (Heard once in "First Snow", "All Tire'd Out", "Sticky Situation", "Weather or Not", "Say What?", "Fran Takes a Hike", "Twinkle's Favorite Author" and "Kip's Dad Gets a Strike".)
KaBlam! (Heard in the "Trouble With Inflation" episode of "Life With Loopy".)
The Mr. Men Show (Heard once in "Gifts".)
The New Adventures of Winnie the Pooh (Heard in "The 'New' Eeyore", "Bubble Trouble", and "Grown, But Not Forgotten".)
Noddy (Heard once in "Jack Frost is Coming to Town" during the song "Jack Frost is Back in Town".)
Pee-wee's Playhouse (Heard once in "Monster in the Playhouse".)
Popeye and Son
Sesame Street (Heard once in "I Love the Letter E".)
Tweenies (Heard once in "Old & New".)