My Friends Tigger & Pooh - Season 1 Episode 14 -

Pooh and the gang have had some trouble deciding what game to play, but have finally come to a compromise. They decide to go with Pooh Sticks first, but find that their sticks are getting stuck. They discover all of the water has disappeared from one side of the stream in which they traditionally play the game. They decide to investigate to find out what's blocking things up.